LOW-PROFILE CONCEALED FLUSH CINCULATION

Description

[0001] The invention relates to a low-profile concealed cistern module, a WC arrangement and a use of the concealed cistern module for realizing the WC arrangement.

[0002] Generic concealed cistern modules are intended to be arranged in a space between a building wall and a pre-wall provided in front of the building wall, with the pre-wall forming a boundary wall of a room with its side facing away from the building wall, so that the concealed cistern module is concealed by the pre-wall when viewed from the room. The pre-wall typically has several through-openings through which the concealed cistern module is accessible from the room. The side of the pre-wall facing the room is usually referred to as the access side of the pre-wall, from which access to the concealed cistern module is possible through the through-openings. Typically, at least one first through-opening is provided, behind which an inspection opening of the concealed cistern module is arranged, through which access to the interior of the cistern of the concealed cistern module is granted.Furthermore, such a pre-wall usually has at least one further through-opening, via which a WC body, which is to be fastened on the access side, can be connected to a flush pipe of the cistern and a building-side wastewater line by means of connecting pipes, and through which fastening means can be provided via which the WC body can be fastened. Typically, generic concealed cistern modules have a mounting frame to which the cistern is fixed, wherein the fastening means are designed to fasten the WC body to the mounting frame. Preferably, the fastening means for fastening the WC body are designed in a wall-mounted installation, in which the WC body is usually spaced vertically from a floor on which the mounting frame is placed.Unlike a floor-standing installation, with a wall-mounted installation the toilet body of a toilet arrangement is held by means of the fastening means to the mounting frame, which in turn is placed on a floor, so that the toilet body is not placed on the floor but is held relative to the floor via the mounting frame and is vertically spaced from the floor. In a generic toilet arrangement, the toilet body is therefore usually designed as a wall-mounted toilet body. Furthermore, with a wall-mounted installation the waste water opening of the toilet body usually runs with its opening cross-section along the vertical, so that a horizontally running connecting pipe can be connected to this waste water opening or inserted into it.Typically, a connection for the flush pipe (flush pipe connection) and a connection for the wastewater pipe (drain pipe connection) are provided in the space between the building wall and the pre-wall, with the toilet body, in its intended operating condition, being connected to each of the connections via a connecting pipe which extends from the space behind the pre-wall through the pre-wall and is connected to the toilet body on the access side of the pre-wall. The toilet body has, as connections, a flush connection with a flush inlet opening and a drain connection with a wastewater opening, with the flush connection being connectable to the flush pipe connection by a first connecting pipe and the drain connection being connectable to the drain pipe connection by a second connecting pipe. The flush inlet opening and wastewater opening have a clear cross-section through which flush water can enter the toilet body (flush connection) and drain water out of the toilet body.can escape (drain connection). This clear cross-section usually runs in the vertical direction and in the transverse direction. Usually, the mounting frame comprises a fastening device for fastening a tubular drain pipe connection in an installed state of the concealed cistern module, in which the mounting frame of the concealed cistern module is placed on a level floor, wherein the fastening device for fastening the drain pipe connection is designed vertically at a vertical distance of at least 140 mm, in particular at least 160 mm from the floor and / or by determining the vertical position of its vertical center at a vertical distance of at least 200 mm from the floor.In a toilet arrangement, in an installed state, a vertical center of the drain pipe connection and in particular a vertical center of the waste water opening of the toilet body is vertically removed from the floor by at least 200 mm, in particular between 200 mm and 300 mm.

[0003] Generic concealed cistern modules generally comprise a cistern and a flush pipe connected to the cistern for fluid flow, which is often curved and designed as a flush pipe bend. The cistern is designed to store a defined flush volume of flush water when its drain valve is closed, and to discharge stored flush water from a drain opening via the flush pipe to a toilet body connected to the flush pipe when its drain valve is open. For this purpose, the cistern has a wall designed to store the flush water when the drain valve is closed. The toilet body typically has a flush inlet opening that is connected to the flush pipe for fluid flow.The flush water entering the toilet bowl via the flush inlet is typically used to flush the toilet bowl. Any contaminants contained in the toilet bowl, such as human excrement, are carried out of the toilet bowl with the flush water. The contaminant-laden flush water is then drained out of the toilet bowl via a wastewater outlet, for example, into a building's wastewater pipe. In concealed cistern modules of this type, the flush pipe provides a fall height for the flush water stored in the cistern. The flush water falls from the cistern's drain opening before flowing into the flush inlet of the toilet bowl, which is connected to the cistern's flush pipe, at a flow velocity that depends on the fill level of the stored flush water in the cistern, the fall height, and the overall geometry of the cistern.At this flow velocity, it flows with an impact pressure resulting from the aforementioned parameters into the upwardly open bowl of the toilet body, on the top of which a toilet seat is usually provided, and from there it flows through a siphon provided in the toilet body to the waste water opening of the toilet body. In a normal operating state in which the toilet body or the toilet arrangement can be used and in which no flush water flows through the toilet body, the siphon is filled with sealing water up to a vertical sealing water level to ensure its function. This level results from the geometry of the toilet body comprising the siphon and at which the water surface of the sealing water lies. During a flush, the flush water flows through the toilet body as explained and also through the siphon until a rest state is reached again which corresponds to the normal operating state.The sealing water remaining in the siphon prevents the passage of odors from a connected wastewater pipe through the open-topped bowl into a room in which the toilet body is installed. The siphon is typically designed such that the vertical center of the clear cross-section of the drain connection of the toilet body is spaced vertically by less than 100 mm, in particular less than 70 mm, in particular less than 60 mm, from the water surface of the sealing water, thereby ensuring easy flow of the flush water through the toilet body as it flushes contaminants out of the toilet body, accelerated by the force of gravity from the cistern.Typically, the vertical position of the water surface of the sealing water in the intended operating state forms the highest vertical point of the siphon, so that the flushing water necessarily flows from the siphon to the drain connection of the toilet body as soon as it passes vertically above this vertical position. To ensure effective flushing away of soiling, the waste water opening of the drain connection of the toilet body is connected to the bowl by a channel which forms the siphon and has a continuous clear cross-section over its course, starting from the bowl to the waste water opening. Preferably, its clear cross-section has a first value at the deepest point of the siphon and increases as it continues from the deepest point of the siphon to the waste water opening or is at least consistently at least 90% of the first value.This shape of the clear cross-section particularly facilitates the passage of flush water and the flushing away of dirt caused by the flushing flow, which in turn is generated by the free fall of the flush water from the cistern into the bowl of the toilet body. The bowl, waste outlet, and flush inlet are usually integrally formed into a single piece of ceramic. The cleaning effect of flushing water to remove dirt from the toilet body depends largely on the flow rate of the flush water, the impact pressure of the flush water, and the amount of flush water directed from the cistern into the toilet body.

[0004] In generic concealed cistern modules, the flush water stored in the cistern is accelerated when the drain valve is open by the gravitational force acting on the flush water. Accordingly, generic cisterns have a wall suitable for storing a large volume of, for example, 10 l of flush water. The wall of the cistern is spaced a large distance from the toilet body in a vertical direction that runs generally parallel to the gravitational force acting on the earth to ensure a large fall height for generating a high flow velocity. In addition, the cistern wall has a considerable vertical extension so that the flush water can be stored in the wall at a high fill level to generate the greatest possible gravitational pressure. The maximum fill level of a cistern is determined by a specified fill limit.At this fill line, a typical cistern has an overflow, which ensures that flush water flows out of the cistern through the overflow as soon as the fill line is exceeded. The overflow is usually connected to the flush pipe so that any flush water above the fill line can be discharged directly into a connected toilet bowl via the overflow while the drain valve is closed. The cistern wall must extend well beyond this fill line, as a fill valve is usually provided within the cistern wall. This fill valve is connected to an inlet connection of the cistern and can be used to discharge flush water from a building-side flush water line into the cistern.Such an inlet connection is typically provided at an inlet opening in the wall of the cistern, and a building-side flush water line can be connected to the inlet connection from the outside, for example, by the inlet connection having standard threaded or clamping sections. Such a fill valve is absolutely common in the state of the art and is usually float-controlled, so that the fill valve opens or closes depending on the flush water level in the wall.The fill valve is usually set so that it closes and thus no longer releases any more flush water from the flush water line connected to the inlet connection into the wall as soon as the flush water in the wall has reached a target fill level. Starting from its closed position, it only opens when the flush water level falls by a predetermined minimum value, for example 5 mm or 2 mm, below the target fill level. A fill valve usually has a valve outlet through which it releases flush water into the wall of the cistern. The fill valve is usually designed to release flush water exclusively via its valve outlet. Usually, a dip tube is connected to the valve outlet, through which water flowing from the valve outlet can be released into the wall of the cistern.The immersion pipe serves to minimize noise by opening into the wall at a distance of typically at least 5 cm, in particular at least 15 cm, below the fill line. It should be noted here that the fill line is typically at least 1 cm, preferably at least 2 cm, above the target fill level. A fill valve typically used in concealed cistern modules of this type also has considerable external dimensions and extends over several centimeters. In addition, to avoid contamination of the building's flush water line connected to the inlet connection, a sufficient vertical distance of at least 4 cm, preferably at least 4.5 cm, must be provided between the valve outlet of the fill valve and the target fill level, and thus also a vertical distance of at least 1 cm, in particular at least 2 cm, between the valve outlet and the fill line.The vertical extension of a fill valve therefore usually ends at least 5 cm, in particular at least 6 cm above the fill line. In addition, a generic cistern usually has an inspection opening above the fill line, which can only be closed with a splash guard plate, so that the cistern wall at the level of the inspection opening is not suitable for storing flush water. This inspection opening is usually provided on a front side or, for the implementation of low-profile cisterns, preferably on an upper side of the cistern, which, when properly installed, faces the pre-wall or cover wall behind which the concealed cistern module is to be installed, so that access to the interior of the cistern is guaranteed through a corresponding through-opening in the pre-wall via the inspection opening.Operating rods are usually passed through this splash guard plate, via which the cistern drain valve can be operated using actuating buttons attached to the access side of the pre-wall. This requires additional space. Cisterns of generic concealed cistern modules must therefore have a considerable height due to mandatory components, and to provide a sufficient free fall height for the flush water and a sufficient fill height in the cistern to provide sufficient gravitational pressure, a considerable vertical extension of the cistern and the flush pipe must be provided. As a result, generic concealed cistern modules usually have a vertical extension of over 1 m. A corresponding generic flush pipe has a vertical extension of, for example, more than 200 mm.Concealed cistern modules are therefore only suitable for installation behind a prefabricated wall, which in turn has a vertical extension that corresponds at least to the vertical extension of the generic concealed cistern module, which is often over 1 m. The options for interior design of a room, such as a bathroom, are correspondingly limited, as a generic concealed cistern module cannot be installed on low-rise walls that have a smaller vertical extension. However, a smaller vertical extension, often less than 80 cm, is common, for example, in walls that are arranged vertically below a window or that are designed, for example, as a vanity unit to support a sink.Concealed cistern modules of this type are not suitable for installation behind such low pre-walls, as the conditions described make it practically impossible to save even a single centimeter in vertical installation height using conventional low-profile concealed cistern modules.It should be noted at this point that in addition to the toilet bodies designed for connection to generic concealed cistern modules, where flushing is based on a flow velocity generated by the free fall of dammed flush water and an impact pressure generated by the free fall of the dammed flush water, there are other types of toilets where dirt can be removed in other ways, for example in siphon toilets by building up a negative pressure at a waste water outlet, where the negative pressure is generated by a siphon that has the greatest possible vertical extension and where flush water is only used to fill one bowl section and the siphon of the siphon toilet, or in dry-vacuum toilets, where the use of flush water is almost entirely dispensed with. For such toilets, the provision of a generic concealed cistern module is not advisable.

[0005] A previously known concealed cistern module is known, for example, from DE 10207067 A1. This concealed cistern module is suitable for pre-wall heights of approximately 85 cm to 140 cm. DE 2653363 A1 discloses a panelable cistern module, which in one embodiment has a height of 845 mm and in another embodiment a height of 860 mm. WO 2013 / 011454 A1 discloses a drain fitting comprising a cistern and a drain valve.

[0006] The object of the present invention is to provide a concealed cistern module, a WC arrangement and a use of the concealed cistern module for realising the WC arrangement, which at least partially eliminates at least one of the above-mentioned disadvantages.

[0007] As a solution to the problem underlying the invention, the invention proposes a concealed cistern module with features according to claim 1. The concealed cistern module according to the invention, which can be described as low-profile due to its small vertical extent, which can be achieved according to the invention, comprises a cistern and a flush pipe bend. The cistern comprises a drain valve and a wall, wherein the wall has an inlet opening and a bottom side relative to a vertical direction, wherein it has a drain opening on its bottom side. In a closed state, the drain valve rests in a sealing manner on an edge surrounding the drain opening to prevent flush water stored in the wall from escaping from the drain opening.For this purpose, the drain valve preferably has a particularly annular, preferably rubber-elastic seal which, when the drain valve is closed, rests sealingly directly on the edge surrounding the drain opening. The flush pipe bend connected to the drain opening comprises a flush pipe opening and a curved section running between the flush pipe opening and the drain opening. The drain opening and the flush pipe opening are connected to one another in a fluid-conducting manner via the curved section. Due to its design in the manner of a pipe, the first pipe end of which points towards the drain opening and the second pipe end of which forms the flush pipe opening, the flush pipe bend is designed to guide all flush water that has escaped from the drain opening and was previously stored in the wall of the cistern and to discharge it from the flush pipe opening.In an open state, the drain valve is spaced from the edge of the drain opening, in particular vertically spaced, to release the drain opening so that the flushing water can pass through the drain opening. The drain valve has an overflow opening which, in the closed state and in particular also in the open state, is fluidly connected to the flush pipe opening and whose vertical position defines a fill limit up to which flushing water can be stored in the wall in the closed state. In particular, the overflow opening and the flush pipe bend are fluidly connected in the closed state by means of an overflow pipe, in particular with its pipe axis running straight in the vertical direction. Preferably, the seal of the drain valve is arranged on the outside of the drain pipe in a closed circumferential manner. In particular, the drain opening is annular in shape between the edge of the drain opening and the outside of the drain pipe in the open state.Preferably, the wall is formed in one piece along its extension in the vertical direction from the drain opening to the filling limit.

[0008] As explained with regard to generic cisterns, the cistern preferably has an inlet connection at its inlet opening, wherein a fill valve is connected to the inlet connection within the wall of the cistern. The inlet connection is preferably designed such that it protrudes beyond the wall and a building-side flush water pipe can be connected to it in a conventional manner. The fill valve is designed in a conventional manner to allow an inflow of flush water into the wall, i.e. into the cistern volume enclosed by the wall, and thus to be in the open state precisely when the flush water stored in the wall does not reach a target fill level. Such a fill valve can, for example, be electronically sensor-controlled or mechanically float-controlled.When the target fill level is reached, the fill valve switches to a closed state, preventing flush water from flowing into the cistern. Particularly preferably, the fill valve is set such that the target fill level is at least 10 mm, in particular at least 15 mm, in particular at least 20 mm vertically spaced from the overflow opening and thus from the fill line, and thus closer to the drain opening and the flush pipe opening in the vertical direction.

[0009] According to the invention, the flush pipe bend, the wall, and the drain valve are configured to correspond to one another in such a way that the flush pipe opening points perpendicular to the vertical direction and its vertical center is spaced from the fill line by a maximum of 32 cm, in particular between 32 cm and 28 cm, in particular between 31 cm and 27 cm. The vertical center of the flush pipe opening designates a point that is spaced from two opposite, absolute vertical ends of the flush pipe opening by an equal distance and that corresponds in particular to a cross-sectional center of a cross-section of the flush pipe opening. The flush pipe opening is delimited by an edge formed by the flush pipe bend, which edge encloses the flush pipe opening.Because the flush pipe opening points perpendicular to the vertical direction, the flush pipe opening has a clear cross-section across which flush water can escape from the flush pipe bend and which runs parallel to the vertical direction. This clear cross-section is preferably at least 10 cm 2 , in particular at least 12 cm 2 . The drain opening, on the other hand, preferably points in the vertical direction and thus has a clear cross-section across which flush water can escape from the wall of the cistern through the drain opening, which runs perpendicular to the vertical direction. This cross-section preferably has an area of ​​at least 15 cm 2 , preferably at least 20 cm 2 , preferably at least 25 cm 2 .Preferably, further clear cross-sections of the drain opening and the flush pipe opening that are at an angle to the above-mentioned clear cross-sections are not provided, or at least have less than a quarter of the area of ​​the above-mentioned clear cross-sections of the respective opening. Furthermore, the flush pipe bend, wall, and drain valve are designed to correspond in such a way that the vertical center of the flush pipe opening is spaced from the drain opening by a maximum of 9 cm, in particular between 9 cm and 6 cm.The vertical position of the drain opening is formed by the vertical position of the edge enclosing and directly delimiting the drain opening, on which edge the drain valve rests in a sealing manner when closed, wherein the vertical position averaged over its circumference around the drain opening is taken into account and the edge is preferably formed by a circumferential line formed by the side of the sealing system facing the drain opening between the wall section surrounding the drain opening and the drain valve. The flush pipe bend is preferably formed in one piece. In particular, the flush pipe bend and the wall of the cistern are jointly formed in one piece or the wall integrally forms a section of the flush pipe bend. In particular, the flush pipe bend and the wall of the cistern are inseparably connected to one another, i.e. can only be separated with damage.Preferably, the above-described clear cross-section of the flush pipe opening runs parallel to the transverse direction and parallel to the vertical direction. The curved section has a curved course in the direction from the drain opening to the flush pipe opening, thereby ensuring a fluid-carrying connection between these differently aligned openings. Particularly preferably, the flush pipe bend has an end section that forms the flush pipe opening, in which the flush pipe bend runs rotationally symmetrically around an axis that is angled by less than 30°, preferably less than 20°, preferably less than 10° to a direction perpendicular to the vertical direction, which is preferably also perpendicular to the transverse direction. This ensures a particularly simple connection of a flush inlet opening of a toilet body to the flush pipe opening by means of a connecting pipe.Preferably, the flushing pipe bend in this end section has a projection with a seal into which a cylindrical connecting pipe can be inserted, thereby sealing the flushing pipe bend fluid-tight to the connecting pipe.

[0010] The inventors have surprisingly discovered that a concealed cistern module with the features according to the invention can be designed with a particularly low profile compared to generic concealed cistern modules without losing the required sufficient flushing effect. Contrary to expert considerations, fluid friction of the flush water on the wall and on the flush pipe bend is particularly low when the features according to the invention are present, while simultaneously ensuring a sufficient fall height of the flush water, so that the flush water can exit the flush pipe end of the flush pipe bend at a sufficiently high flow rate and sufficient pressure.The inventors have recognized that the aforementioned interplay between, on the one hand, the vertical distance from the flush pipe opening to the fill line and, on the other hand, from the flush pipe opening to the drain opening is particularly advantageous for this purpose. The combination of these distances allows for sufficient gravitational pressure and sufficient gravitational acceleration of the flush water, while, on the other hand, sufficiently slows down the flow of the flush water in the flush pipe bend. The invention thus enables the realization of particularly low-profile concealed cistern modules, opening up new installation possibilities for such concealed cistern modules. The invention achieves this through a simple and robust design of the concealed cistern module.

[0011] In a preferred embodiment, the flush pipe bend forms a flush water guide that is continuously free of undercuts from the edge of the drain opening to the end of the bend section facing the flush pipe opening. This eliminates sudden cross-sectional changes in the flush pipe bend along its course, starting from the drain opening to the end of the bend section facing the flush pipe opening, particularly on the inside of the flush pipe bend. In particular, the flush water guide is designed to be burr-free. The flush water guide extends from the edge of the drain opening to the bend section and beyond said bend section, particularly to the flush pipe opening, and forms a flush pipe space enclosed by the flush pipe wall and delimited by the inside of the flush pipe bend.Thus, the flushing water guide is designed to continuously guide flushing water from the edge of the drain opening in the direction of, in particular up to, the flushing pipe opening, wherein the flushing pipe bend is continuously enclosed by the flushing pipe wall along the entire extent of the flushing water guide. The flushing pipe bend is accordingly designed to be free of undercuts at least along the entire extent of the curved section. In one embodiment, the curved section is spaced from the flushing pipe opening, in particular by at least 3%, in particular at least 5%, in particular between 3% and 20%, in particular between 3% and 10% of the extension length of the flushing pipe bend from the drain opening to the flushing pipe opening, wherein a projection, in particular a groove for a seal, is provided in the flushing pipe bend between the curved section and the flushing pipe opening.The section of the flush pipe bend extending from the end of the curved section facing the flush pipe opening to the flush pipe opening can be designed as an end section. In one embodiment, the curved section extends to the flush pipe opening. In particular, an edge-free clear cross-section is formed continuously on the inside of the flush pipe bend over its extension, starting from the drain opening to the end of the curved section facing the flush pipe opening. In particular, the flush pipe bend is designed with smooth walls on the inside, preferably along the entire extension of its curved section. Thus, the inner wall of the flush pipe bend delimiting the flush water guide only has discontinuities along its length that are hydraulically negligible. For example, the flush pipe bend preferably has a hydraulically effective roughness of a maximum of 0.05 along its flush water guide.In particular, the flush pipe bend has no elevations on its inner side along the entire extent of the flush water guide that protrude more than 1 mm, in particular more than 0.5 mm, in particular more than 0.1 mm into the interior space enclosed by the inner side. Undercut-free in the sense of the present invention means that a first cross section that is arranged after a second cross section in the flow direction of the flush water, which is directed from the drain opening to the flush pipe opening, wherein each of the cross sections runs perpendicular to the flow direction and intersects the flush water guide perpendicular to the flow direction, has a cross section that is the same as or smaller than the second cross section, wherein in particular any change in cross section between the first cross section and the second cross section occurs continuously along the flow direction.The inventors have determined that such an undercut-free flush water guide of the flush pipe bend is associated with a particularly small reduction in the flow velocity of the flush water due to fluid-dynamic friction losses. The inventors have recognized that the realization of this particularly preferred embodiment requires a departure from conventional manufacturing processes for cisterns. In the interest of the most cost-effective mass production possible, such cisterns are usually manufactured from a plastic by injection molding. Such injection molding processes use injection molding tools that are as inexpensive to manufacture as possible, which means that undercuts, in particular burrs, are created when implementing a complex geometry, as is the case with a cistern with a flush pipe bend.The inventors have recognized that a departure from such typical manufacturing processes is necessary, for example by using complex injection molding tools, for example by using a rotating core to realize the flush pipe bend, or by post-processing the cistern produced by means of the injection molding process, such as by grinding processes.

[0012] In an advantageous embodiment, the wall of the cistern is designed such that, when closed, the flushing water can be stored in the wall with a volume of at least 6 liters, in particular at least 8 liters, in particular at least 10 liters. This means that only when flushing water with a volume greater than the aforementioned flows into the previously empty wall of the cistern in the closed state, is the flushing water discharged via the overflow opening through the flush pipe opening. In the preferred embodiment, two absolute transverse ends of the wall are spaced apart from each other in the transverse direction by no more than 2 times, in particular no more than 1.7 times, in particular no more than 1.6 times the vertical distance between the fill limit and the vertical center of the flush pipe opening.Particularly preferred are two absolute sagittal ends, where "sagittal" means along a sagittal direction that runs perpendicular to the vertical direction and perpendicular to the transverse direction, spaced from each other by no more than 70%, in particular no more than 60%, in particular no more than 55% of the vertical distance between the fill limit and the vertical center of the flush pipe opening. Generally advantageously, the drain opening of the wall is formed by an absolute vertical end of the wall on its underside, wherein the flushing water is stored in the wall above the drain valve when the drain valve is closed.Because flushing water with the specified volume can be stored in the wall when closed, while at the same time the wall of the cistern has a small extension perpendicular to the vertical direction, a compact design is possible which can nevertheless provide a large volume of flushing water for flushing.

[0013] In an advantageous embodiment, the concealed cistern module further comprises a mounting frame to which the cistern and the flush pipe bend are fixed in a fixed position, in particular relative to one another and relative to the mounting frame. The mounting frame preferably comprises at least two longitudinal struts spaced apart from one another along the transverse direction, wherein the longitudinal struts extend elongatedly along the vertical direction. The longitudinal struts preferably run parallel to one another. In particular, the longitudinal struts are connected by at least one transverse strut, wherein the at least one transverse strut extends elongatedly along the transverse direction, and wherein the transverse strut fixes the longitudinal struts in a fixed position relative to one another. Longitudinal and transverse struts are preferably made of metal. The mounting frame is particularly preferably designed to be height-adjustable, i.e. an extension of the mounting frame along the vertical direction is adjustable.In the advantageous embodiment, the mounting frame has a module base which forms an absolute lower end of the concealed cistern module and with which the mounting frame can thus be placed on a floor. For height adjustment, the at least one module base is preferably adjustable relative to at least one longitudinal strut. In a specific installed state of the concealed cistern module, in which the module base occupies a fixed position relative to the cistern and in which the concealed cistern module is suitable for intended use, the concealed cistern module preferably extends between its lower absolute vertical end and its upper absolute vertical end over a vertical extent of a maximum of 77 cm, in particular a maximum of 75 cm, in particular between 60 cm and 75 cm.Particularly preferably, an absolute upper vertical end of the cistern is spaced vertically downward from the upper absolute vertical end of the concealed cistern module by at least 1 cm, in particular at least 2 cm, in particular by a maximum of 5 cm. In particular, in the specific installed state, the module base is held fixed, in particular locked, in its specified position on the longitudinal struts, wherein, starting from this position, a release of the module base and a subsequent movement of the module base relative to the longitudinal struts downwards, in particular downwards and upwards, into another position is enabled, in which it is also held fixed.Such an extension of the vertical extent of the concealed cistern module by holding the module base in a fixed position in the other position can be advantageous, for example, in applications of the concealed cistern module in which the floor is designed as a finished floor comprising a subfloor and a finished floor covering applied to the subfloor, for example comprising tiles, tile adhesive, in particular screed and / or a sound insulation layer, wherein the module base is placed on the subfloor and the finished floor covering is applied, preferably outside the horizontal area of ​​the module base, in front of the mounting frame to the subfloor across the horizontal area, within which, vertically offset to the floor, a WC body is to be arranged and fixed to the mounting frame.Such a finished floor covering can have a different thickness depending on the application, usually in the range of 3 cm to 30 cm, in particular of 5 cm to 20 cm. Accordingly, the module base is preferably held fixed to the longitudinal struts in various vertical positions relative to the latter, wherein a vertical distance between an upper maximum position and a lower maximum position, in which the module base can be fixed to the longitudinal struts, is at least 15 cm, in particular at least 20 cm, wherein the lower maximum position is the position in which the module base is furthest away from the upper end of the concealed cistern module, and the upper maximum position is the position in which the module base is least far away from the upper end of the concealed cistern module, wherein the upper maximum position is preferably the position of the module base provided in the installed state described above.

[0014] In a particularly advantageous embodiment, the flush pipe bend is formed integrally with the wall of the cistern. This advantageously eliminates the need for connecting points, which typically result in a reduction in the flow rate of the flush water. In particular, the wall and the flush pipe bend are manufactured together in a single process step. In particular, the wall of the cistern and the flush pipe bend are thin-walled, with an average wall thickness of the flush pipe bend and the wall of the cistern being less than 5 mm, in particular 3 mm, in particular 2 mm. Such one-piece and / or plastic manufacturing enables the realization of particularly smooth surfaces, thereby promoting a high flow rate of the flush water.

[0015] In a particularly preferred embodiment, the flush pipe bend is curved within its curved section about an axis of curvature running perpendicular to the vertical direction. Particularly preferably, the curved section extends over at least 60%, in particular at least 70%, in particular at least 85% of the extent of the flush pipe bend running from the drain opening to the flush pipe opening. In particular, the curved section is curved by at least 60°, in particular at least 75°, in particular at least 85° along its extension between the drain opening and the flush pipe opening. Preferably, the flush pipe bend has a curved section exclusively in its curved section, the curvature of which is more than 10°. In particular, the curved section is spaced from the flush pipe opening and / or the drain opening by no more than 20%, in particular by no more than 10%, in particular by at least 5% of the said extension of the flush pipe bend.In particular, the flush pipe bend is curved, having a curvature of at least 80°, in particular between 80° and 110°, in particular between 85° and 95° around a curvature axis running in particular in the transverse direction. Generally, the transverse direction runs perpendicular to the vertical direction. The radius of curvature describes a distance between the curvature axis and the center of a pipe cross-section of the flush pipe bend, with the curvature being based on the course of the center of the pipe cross-section along the course of the flush pipe bend. Particularly preferably, an average radius of curvature of the bend section is a maximum of 8 cm, in particular a maximum of 6 cm, in particular a maximum of 5 cm, and in particular at least 4 cm.The inventors have discovered that by designing a deflection along the curved path of the flush pipe bend with the specified radius of curvature, a reduction in the flow velocity of the flush water is reduced to a negligible level. This advantageous embodiment thus contributes to the desired compact design of the concealed cistern module.

[0016] In a preferred embodiment, the flush pipe bend has a particularly elliptical, particularly circular, pipe cross-section that continuously decreases, in particular by 0.03 mm / ° to 0.08 mm / °, in particular 0.05 mm / ° to 0.06 mm / °, along its curvature within the curved section, which extends over at least 70%, in particular at least 80% of the extent of the curved section. The pipe cross-section refers to a radially running free cross-section that is completely enclosed radially by the curved section or the inside of the curved section of the flush pipe bend and through which the flushing fluid can be passed, in particular along the flushing water guide. The flow velocity of the flushing water can be influenced by the decreasing pipe cross-section, in particular in such a way that the flow velocity increases from the drain opening to the flush pipe opening, which is generally advantageous.

[0017] In a particularly preferred embodiment, the flow path traveled by the flush water from the drain opening to the flush pipe opening is a maximum of 20 cm, in particular a maximum of 15 cm, in particular a maximum of 12 cm. Particularly preferably, the flush pipe opening is spaced from a sagittal end of the mounting frame by at least 5 mm, in particular at least 10 mm. By ensuring the shortest possible flow path, the flushing effect is further optimized with a compact design of the concealed cistern.

[0018] In an advantageous embodiment, the cistern comprises a filling valve connected to the inlet opening of the wall, which has a valve outlet for discharging flush water into the wall. The wall is preferably designed such that flush water enters the wall exclusively through the inlet opening. The inlet opening is preferably arranged above the overflow opening. The valve outlet is preferably vertically spaced at least 2 cm from the overflow opening. In this case, a vertical end of the outlet opening and the overflow opening are each aligned, with the vertical ends facing each other. The filling valve is preferably arranged in the wall. Generally, the term "in the wall" describes an interior space enclosed by the wall into which the flush water is discharged. The wall encloses the interior space and thus carries the flush water.

[0019] The invention further comprises a WC arrangement, wherein the WC arrangement comprises a concealed cistern module according to the invention with a mounting frame and a WC body fixed in a fixed position to the mounting frame of the concealed cistern module. The WC body has a flush inlet opening pointing perpendicular to the vertical direction and thus having a clear cross-section running along the vertical direction, which is fluid-conductingly connected to the flush pipe opening, in particular by means of a connecting pipe, for transferring flush water from the wall into the WC body, in particular into a bowl of the WC body, wherein the WC body is preferably designed as a low-flush WC body. Preferably, the WC body is detachably fixed to the mounting frame. Particularly preferably, the WC body is fixed to the access side of the wall, wherein the cistern of the concealed cistern module is arranged on a side of the wall facing away from the access side.A vertical center of the flush inlet opening is spaced in the vertical direction by a maximum of 32 cm, in particular between 32 cm and 28 cm, in particular between 31 cm and 27 cm, from the fill limit and thus the overflow opening. The vertical center of the flush inlet opening means a point on the flush inlet opening that is vertically spaced an equal distance from two opposite absolute vertical ends of the flush inlet opening. Furthermore, the vertical center of the flush inlet opening is spaced by a maximum of 9 cm, in particular between 9 cm and 6 cm, from the drain opening. In particular, the vertical center of the flush inlet opening and the vertical center of the flush pipe opening are spaced from each other perpendicular to directions in which the flush pipe opening and the flush inlet opening point, in particular perpendicular to the sagittal direction, by a maximum of 3 cm, in particular between 3 cm and 0 cm, in particular between 1 cm and 0 cm.Particularly preferably, the flush pipe opening and the flush inlet opening are arranged in alignment with one another, whereby this means that a deviation from an ideally aligned arrangement amounts to a maximum of 10 mm, in particular a maximum of 3 mm. Particularly preferably, an absolute upper vertical end of the concealed cistern module is spaced by a maximum of 75 cm from a horizontal region of an upper side of a floor, which is located vertically below the toilet body fixed to the mounting frame and is thus arranged exclusively within the horizontal extension of the toilet body, in particular within the horizontal extension of the siphon of the toilet body. Preferably, the floor comprises a subfloor and a finished floor covering applied to the subfloor, wherein the finished floor covering forms the aforementioned region of the upper side of the floor and the module base of the mounting frame is placed on the subfloor outside the finished floor covering.

[0020] In a preferred embodiment, an absolute vertical upper end of the concealed cistern module, in particular of the mounting frame, and an absolute vertical upper end of the toilet body pointing in the same direction are spaced from each other by a maximum of 42 cm, in particular between 42 cm and 25 cm, in particular a maximum of 38 cm, in particular a maximum of 36 cm, in particular between 38 cm and 25 cm, in particular between 37 cm and 30 cm, in particular between 36 cm and 31 cm. In one embodiment, the toilet body is a one-piece ceramic body. In particular, the toilet body has a vertical extension of a maximum of 50 cm, in particular a maximum of 40 cm, in particular a maximum of 35 cm.Preferably and generally advantageously, the toilet body of the toilet arrangement is designed for suspended attachment to the mounting frame, wherein the toilet body in the toilet arrangement is spaced at least 5 cm, in particular at least 10 cm, vertically from an upper surface of the floor arranged below it by its absolute vertical lower end. In particular, the absolute vertical lower end of the concealed cistern module, in particular of the mounting frame, is spaced at least 5 cm vertically from the vertical lower end of the toilet body. This preferred embodiment ensures a compact design of the toilet arrangement while simultaneously enabling a comfortable sitting position on the toilet body.

[0021] The invention further comprises a use of a concealed cistern module according to the invention for implementing a WC arrangement according to the invention. The use according to the invention provides that a WC body having a flush inlet opening is fluidly connected by its flush inlet opening to a flush pipe opening of the flush pipe bend. In particular, the WC body further has a drain opening, wherein the WC body is connected by its drain opening to a building-side drain line. Particularly preferably, the fluid-conducting connection between the flush inlet opening of the WC body and the flush pipe opening of the flush pipe bend is established by means of a connecting pipe, wherein in particular the fluid-conducting connection between the drain opening of the WC body and the building-side wastewater line is established by means of a further connecting pipe.The toilet body is, in particular, releasably and permanently attached to the mounting frame, in particular by force-fitting and / or form-fitting. In particular, the toilet body is attached to the mounting frame in such a way that the mounting body supports the toilet body. The distance from a vertical center of the flush inlet opening of the toilet body, which is permanently attached to the mounting frame, in the vertical direction to the fill level is at most 32 cm, in particular between 32 cm and 28 cm. The vertical center of the flush inlet opening is spaced from the drain opening by at most 9 cm, in particular between 9 cm and 6 cm, in the vertical direction.Particularly preferably, the mounting frame is first placed on a floor with its module base 31, such that an absolute vertical end of the concealed cistern module pointing away from the floor is spaced by a maximum of 75 cm, in particular between 60 cm and 75 cm, from a horizontal region of an upper side of the floor, which is located vertically below the WC body fixed to the mounting frame and points vertically towards it. The horizontal region of the floor extends along a plane that is perpendicular to the vertical direction and thus horizontal. In particular, the WC body, with its vertical end facing away from the floor, is spaced in the vertical direction from this horizontal region of the floor by at least 35 cm, in particular between 35 cm and 50 cm, in particular at least 39 cm.

[0022] The concealed cistern module according to the invention can have features that are disclosed in connection with generic concealed cistern modules and / or with advantageous embodiments of the concealed cistern module according to the invention. Furthermore, the concealed cistern module according to the invention can have features that are disclosed in connection with the WC arrangement according to the invention or the use according to the invention for implementing a WC arrangement. The WC arrangement according to the invention can have features that are disclosed in connection with the concealed cistern module according to the invention. The use of the concealed cistern module according to the invention can include features that are disclosed in connection with the concealed cistern module according to the invention.

[0023] The invention is explained in more detail below with reference to three figures using an embodiment of a concealed cistern module.

[0024] They show: Figure 1: a schematic diagram of an embodiment of a concealed cistern module; Figure 2: a schematic diagram of the cistern and the flush pipe of the concealed cistern module from Figure 1 ; Figure 3: in a schematic diagram of an embodiment of a toilet arrangement.

[0025] Figure 1 comprehensively the Figures 1a and 1b shows a schematic diagram of an embodiment of an advantageous embodiment of a concealed cistern module 100, wherein Figure 1b a front view looking in the sagittal direction, and Figure 1aa sectional view along a sectional plane A, which runs perpendicular to the transverse direction X. The concealed cistern module 100 comprises a cistern 1 and a flush pipe bend 2, both of which are fixed in a fixed position on a mounting frame 3 formed from metal struts. The mounting frame 3 is designed to be vertically height-adjustable in stages and for this purpose has a plurality of vertically displaceable module feet 31. The vertical direction Z runs parallel to the direction of action of the gravitational acceleration g. The cistern 1 is fastened in a vertically upper region of the mounting frame 3 between two longitudinal struts, which are connected by a plurality of transverse struts, wherein the cistern 1 comprises a wall 12 having an inlet opening 13 and an outlet opening 14.The cistern 1 further comprises a drain valve 10, which is arranged in the wall 12 and closes the drain opening 14 by sealingly resting with a seal on an edge 141 surrounding the drain opening 14. The drain valve 10 comprises an overflow pipe, which connects an overflow opening 101 of the drain valve 10 to the flush pipe opening 20 in a fluid-conducting manner, wherein the overflow opening 101 defines a fill limit. Flush water can be stored up to the fill limit in the wall 12 of the cistern 1 without flush water being drained from the cistern via the overflow opening 101 from the drain opening 14. Accordingly, in a closed state in which the drain opening 14 is closed by the drain valve 10, flush water can be stored up to the fill limit in the wall 12.The cistern 1 is designed such that a distance h 3 provided between the fill level and the edge 141 of the drain opening 14 in the vertical direction Z is 31 cm, although this distance means that the illustrated embodiment is not in accordance with the invention. In an open state, the drain valve 10 is vertically spaced from the edge 141 of the drain opening 14, thereby releasing the flush water stored in the wall 12 to flow out through the drain opening 14.

[0026] The flush water flows from the drain opening 14 into the flush pipe bend 2 arranged below the cistern 1, which directly connects to the drain opening 14. The flush pipe bend 2 extends from the drain opening 14 to a flush pipe opening 20 via a curved section 21 which is curved by 90° around an axis of curvature running in the transverse direction X. Accordingly, the flush pipe opening 20 points in the sagittal direction Y and the drain opening 14 in the vertical direction Z. The curved section 21 encloses with its pipe wall a flush water guide which is designed without undercuts, whereby the pipe cross-section of the flush water guide decreases continuously from the drain opening 14 to the flush pipe opening 20 by 0.055 mm / °. The cistern 1 and the flush pipe bend 2 are each made of polypropylene. The drain opening 14 and a vertical center of the flush pipe opening 20 are spaced apart in the vertical direction Z by a distance h 4 , which is 9 cm.Accordingly, the vertical distance h 2 between the filling limit and the vertical center of the flush pipe opening 20 is 40 cm in the present case, whereby the illustrated embodiment is not in accordance with the invention because of this distance.

[0027] Figure 2 comprehensively the Figures 2a and 2b shows schematically and as a principle sketch the cistern 1 with the flush pipe bend 2 connected to the wall 12, where Figure 2a an isometric view and Figure 2ba sectional view along a sectional plane that runs perpendicular to the sagittal direction Y. In the vertical direction Z above the fill limit defined by the overflow pipe opening 101, the inlet opening 13 is arranged, wherein a filling valve 15 is connected to the inlet opening 13, which is designed to discharge the flushing water entering through the inlet opening 13 via a valve outlet into the wall 12, wherein the filling valve 15, when a predetermined volume of flushing water is stored in the cistern 1, closes its outlet opening and prevents further discharge of flushing water into the wall 12. The inlet opening 13 and the valve outlet of the filling valve 15 are fluid-conductingly connected by a plastic pipe that runs transversely above the fill limit.

[0028] In Figure 3 a schematic diagram of a WC arrangement 1000 according to the invention is shown, wherein the WC arrangement 1000 comprises a concealed cistern module 100 made of Figure 1 and a WC body 200, which is fixed to the concealed cistern module 100. In this case, a Figure 3 The non-visible flush inlet opening of the toilet body 200 is fluidly connected to the flush pipe opening 20 of the flush pipe bend 2 by means of a connecting pipe with a connection fitting for transferring flush water from the wall 12 into the toilet body 200. The flush inlet opening faces the mounting frame 3 and is therefore concealed by the toilet body 200. The toilet body 200 is designed as a wall-mounted toilet body. The mounting frame 3 is placed on a floor comprising a subfloor 4 and a finished floor covering 5 applied to the subfloor 4, which are Figure 3are shown very schematically only with their respective vertical upper sides, wherein in the present case the finished floor is applied to the unfinished floor after the assembly frame has been installed on the unfinished floor. The toilet body 200 is spaced apart in the vertical direction Z from the module base 31, which is placed on the unfinished floor, and has a vertical distance h 5 between an absolute vertical upper end of the toilet body 200 and a horizontal region of an upper side of the finished floor covering arranged on the unfinished floor and below the toilet body, which distance is 40 cm. In the present embodiment, the module base 31 can be fixed in various vertical positions on the longitudinal struts of the assembly frame 3. In a first position, which in Figure 3not shown, an underside of the module base 31 forming an absolute lower vertical end of the concealed cistern module is spaced 75 cm from an absolute upper end of the concealed cistern module, wherein this position of the module base 31 can be advantageous for the realization of a WC arrangement 1000 in which the module base 31 is placed on a flat floor whose flat upper side extends without any height offset. In the other position of the module base 31 shown, this vertical distance is set larger. The entire vertical extent of the WC arrangement 1000 corresponds to the absolute vertical extent of the concealed cistern module 100, wherein a distance h 1 between the absolute upper vertical end of the WC arrangement 1000 and the aforementioned horizontal region of the upper side of the floor, which in this case is formed by the finished floor covering 5 of the floor, is 75 cm in this case. List of reference symbols

[0029] 1Cistern 2Flush pipe bend 3Mounting frame 4Unfinished floor 5Finished floor covering 10Drain valve 12Wall 13Inlet opening 14Drain opening 15Filling valve 20Flush pipe opening 21Bend section 22Inlet valve 23Drain opening 31Module base 100Concealed cistern module 101Overflow opening 141Rim 200WC body 1000WC arrangement h 1 distance h 2 distance h 3 distance h 4 distance h 5 distance XTransversal direction YSagittal direction ZVertical direction

Claims

1. Low-profile flush-mounted cistern module (100) comprising a cistern (1) which has a drain valve (10) and a walling (12) having an inlet opening (13) and a lower side, referred to a vertical direction (Z), wherein it has an outlet opening (14) on its lower side and a flush pipe elbow (2) connected in a fluid-conducting manner to the outlet opening (14), which flush pipe elbow has a flush pipe opening (20) and an elbow section (21) extending between the flush pipe opening (20) and the outlet opening (14), characterized in that in a closed state, the drain valve (10) rests sealingly on an edge (141) surrounding the outlet opening (14) to prevent flush water stored inside the walling (12) from escaping from the outlet opening (14) and, in an open state, is spaced apart from the edge (141) to release the outlet opening (14), wherein the drain valve (10) has an overflow opening which, in the closed state, is connected in a fluid-conducting manner to the flush pipe opening (20) and whose vertical position defines a filling limit up to which flush water can be stored inside the walling (12) in the closed state, wherein the flush pipe elbow (2), the walling (12) and the drain valve (10) are designed to correspond to each other in such a way that the flush pipe opening (20) points perpendicular to the vertical direction (Z) and its vertical center is spaced at most 32 cm, in particular between 32 cm and 28 cm, from the filling limit and at most 9 cm, in particular between 9 cm and 6 cm, from a vertical position of the outlet opening (14), wherein the vertical position of the outlet opening (14) is defined by a vertical position of the edge (141) surrounding the outlet opening (14) and directly bounding the outlet opening (14) on which the drain valve (10) rests in a sealing manner when closed, wherein the focus is on the vertical position averaged over its circumference around the outlet opening (14).

2. Low-profile flush-mounted cistern module (100) according to claim 1, characterized in that the flush pipe elbow (2) forms a flush water guide free of undercuts from the edge (141) of the outlet opening (14) to the end of the elbow section (21) facing the flush pipe opening (20).

3. Low-profile flush-mounted cistern module (100) according to claim 1 or 2, characterized in that in the closed state, flush water with a volume of at least 6 liters, in particular at least 8 liters, can be stored inside the walling (12), wherein two absolute transverse ends of the walling (12) are spaced apart in the transverse direction (X) by no more than twice, in particular no more than 1.6 times, the vertical distance between the filling limit and the vertical center of the flush pipe opening (20).

4. Low-profile flush-mounted cistern module (100) according to any of the preceding claims, characterized in that the flush-mounted cistern module (100) further comprises a mounting frame (3) to which the cistern (1) and the flush pipe elbow (2) are fixed in position, wherein the mounting frame (3) has at least one module foot (31) for fastening to a floor, which module foot forms an absolute lower end of the flush-mounted cistern module (100), wherein, in particular, the flush-mounted cistern module (100) extends between its lower absolute vertical end and its upper absolute vertical end over a vertical extension of 75 cm at maximum when installed as intended.

5. Low-profile flush-mounted cistern module (100) according to any of the preceding claims, characterized in that the flush pipe elbow (2) is formed in one piece with the walling (12) of the cistern (1).

6. Low-profile flush-mounted cistern module (100) according to any of the preceding claims, characterized in that the flush pipe elbow (2) is designed as a plastic part.

7. Low-profile flush-mounted cistern module (100) according to any of the preceding claims, characterized in that the flush pipe elbow (2) is curved within its elbow section (21) about an axis of curvature extending perpendicular to the vertical direction (Z), wherein in particular a mean curvature radius of the elbow section is at most 8 cm, in particular at most 6 cm.

8. Low-profile flush-mounted cistern module (100) according to claim 7, characterized in that the flush pipe elbow (2) has a pipe cross-section along its curvature within the elbow section which continuously decreases, in particular by 0.03 mm / ° to 0.08 mm / °, in particular by 0.05 mm / ° to 0.06 mm / °, and, in particular, is elliptical in shape.

9. Low-profile flush-mounted cistern (100) according to any of the preceding claims, characterized in that a flow path to be covered by the flush water from the outlet opening (14) to the flush pipe opening (20) is a maximum of 20 cm, in particular a maximum of 15 cm, in particular a maximum of 12 cm.

10. Low-profile flush-mounted cistern module (100) according to any of the preceding claims, characterized in that the cistern (1) comprises a filling valve (15) connected to the inlet opening (13) of the walling (12), which filling valve has a valve outlet for discharging flush water into the walling (12), wherein the valve outlet is spaced vertically by at least 2 cm from the overflow opening (25).

11. Toilet arrangement (1000) comprising a flush-mounted cistern module (100) according to any of claims 4 to 10 and a toilet body (10) fixed in position on the mounting frame (3) (200), which toilet body has a flush inlet opening pointing perpendicular to the vertical direction (Y) and is connected in a fluid-conducting manner to the flush pipe opening (20) of the flush pipe elbow (2) for transferring flush water from the wall (12) into the toilet body (200), characterized in that a vertical center of the flush inlet opening is spaced in the vertical direction (Z) by at most 32 cm, in particular between 32 cm and 28 cm, from the filling limit and by at most 9 cm, in particular between 9 cm and 6 cm, from the outlet opening (14).

12. Toilet arrangement (1000) according to claim 11, characterized in that an absolute vertical upper end of the flush-mounted cistern module (100), in particular of the mounting frame (3), and an absolute vertical upper end of the toilet body (200) pointing in the same direction are spaced apart by a maximum of 42 cm, in particular a maximum of 38 cm.

13. Use of a flush-mounted cistern module (100) according to any of claims 4 to 10 for the implementation of a toilet arrangement (1000) according to any of claims 11 or 12, characterized in that the toilet body (200) having the flush inlet opening (200) with its flush inlet opening is connected in a fluid-conducting manner to the flush pipe opening (20) of the flush pipe elbow (2) to enable flush water to be transferred from the cistern (1) into the toilet body (200) by means of the flush pipe elbow (2), wherein the toilet body (200) is fixed in position on the mounting frame (3), wherein a vertical center of the flush inlet opening is spaced in the vertical direction (Z) by at most 32 cm, in particular between 32 cm and 28 cm, from the filling limit and by a maximum of 9 cm, in particular between 9 cm and 6 cm, from the outlet opening (14).

14. Use according to claim 13, characterized in that the mounting frame (3) is first fastened with its module foot (31) to a floor so that an absolute vertical end of the flush-mounted cistern module (9) pointing away from the floor (100) is spaced at most 75 cm from a horizontal region of an upper side of the floor which is located below the toilet body and faces vertically towards it, wherein in particular the toilet body (200) with its vertical end facing away from the floor is spaced vertically from this region of the upper side of the floor by at least 39 cm.