WO2018224632A1

WO2018224632A1 - Lavatory

Info

Publication number: WO2018224632A1
Application number: PCT/EP2018/065112
Authority: WO
Inventors: Rolf Weiss; Maurus Zwicker
Original assignee: Geberit International Ag
Priority date: 2017-06-09
Filing date: 2018-06-08
Publication date: 2018-12-13
Also published as: DK3412840T3; JP6981594B2; EP3412840B1; AU2018280778B2; CN110719982A; SI3412840T1; PL3412840T3; CN110719982B; ZA201907555B; AU2018280778A1; PT3412840T; ES2837250T3; IL270805A; DE202017005242U1; EP3412840A1; JP2020522629A

Abstract

The invention relates to a lavatory that comprises a lavatory bowl (1) having a specific inner bowl shape designed for a rotating flow of flush water, wherein a second flow path section (7) provided in addition to the prior art, or a separate second flow path (7), results in an improvement in terms of avoiding splash-over, and thus particularly results in simplifications in terms of avoiding undercuts in the inner bowl shape.

Description

Wasserklosett

The present invention relates to a water closet, hereinafter referred to as WC.

WCs with a toilet bowl, a Spülwasserzufuhr for this and a connected usually via a siphon wastewater drain are common and known. In recent years, additional functions such as shower facilities, odor evacuation and the like have become the subject of further technical development.

WCs have a toilet body, which in particular comprises an upwardly open mold, namely the toilet bowl, and normally, although not necessarily, is made of ceramic. In the ceramic part of Klosettkörpers or in add-on parts or behind or under covers on the ceramic body further technical devices may be provided.

A conventional toilet body has a so-called flushing edge above or at the upper inner edge of the toilet bowl, namely a circulating Spülwas- serkanal with downwardly facing inlet openings for the inflow of rinse water into the toilet bowl; so it works like a ring-shaped shower, which concerns the feeding of the rinse water into the bowl. In addition, toilets are known with a rotating flushing water flow in the toilet bowl, which provide by a largely tangential entrance of the rinse water into the bowl for a vortex-like flow therein before the discharge of the rinse water through the siphon and the waste water drain.

The state of the art refers to EP patent 2 604 761 B1 of the same assignee, which relates to an asymmetrical toilet bowl inner shape that generates or supports a rotating movement of the rinse water. Thus, with comparatively small amounts of flushing water, good rinsing results are obtained. achieved. Moreover, it has been found that this toilet bowl works very quietly.

The present invention has for its object to provide a further improved toilet bowl. This object is achieved by claim 1, which will be explained in more detail below as well as various preferred embodiments. Preferred embodiments of the device according to the invention and its use are specified in the dependent claims. The features contained therein and also the disclosure of the following description are to be understood fundamentally with regard to both categories of invention, without any explicit distinction being made in detail between them.

In order to be able to describe the inner shape of the toilet bowl and the Spülwasserströmung understandable, it is assumed that in a plan view of the bowl opening-defined Achsenkreuz. It is assumed that a circular or oval (in the sense of elongated distorted roundish) bowl opening form. The bowl opening shape typically resembles the approximate inner bowl shape, at least in its upper region. Therefore, it makes sense to set as the longitudinal axis of the longest internal dimension through the bowl opening form and as a transverse axis a perpendicular bisector. For typical toilet bowls, this means that in a typical sitting position on the toilet, the user is looking in the direction of the longitudinal axis and his shoulders are in the direction of the transverse axis. When mounted on a wall, the longitudinal axis is then typically perpendicular to the wall and the transverse axis runs parallel thereto.

In conjunction with numerous experiments and investigations by the inventors, two important core ideas have emerged. Firstly, although the toilet bowl described in the cited patent with the pronounced rotating flushing flow is very advantageous in terms of washing results, noise and water saving potential, other manufacturers also claim for other WC bowls with rotating flushing flow. In contrast to conventional toilet bowls with a classic flush rim, ie a highly In the case of rotating rinsing water flows, there is a general risk that the rinsing water may spill over the top edge of the bowl at too high a speed. This danger is in addition to the concrete design of the bowl interior shape and the resulting flow path also depends on how much inward overhanging the upper edge of the inner shape of the toilet bowl is designed. For example, Figures 5 and 6 of the cited patent show that, despite the avoidance of a classical flushing rim, the bowl shape there overhangs inwardly at this upper edge.

Secondly, such overhanging forms form undercuts which are disadvantageous in terms of production technology. However, less overhanging or even the avoidance of undercuts are advantageous in terms of production technology. This, however, again results in an increased risk of the described overspill.

It has also been found that due to their kinetic energy, the flushing water flow introduced approximately tangentially to the bowl inner mold can be guided relatively well on a steep wall of the bowl inner mold for a limited distance downstream of the inlet opening, in particular at a relatively pronounced concave location such as that through the bowl Longitudinal axis connected ends of an oval bowl shape. But then it tends increasingly to fall off under the influence of gravity. If such a sloping part of the flow then encounters the less inclined flow path described in the cited patent, a quasi-upflowing flow form may occur. In other words, such a sloping flow part is quasi reflected back upwards. Especially in such situations, there is a particular risk of spewing out, especially if the upper edge of the bowl inner mold is not formed clearly undercut. It should be briefly noted in this context that a flow path in the sense of this illustration is understood to mean a web-like surface running in the inner wall of the toilet bowl, which extends outwards, ie in the transition to the white part. the wall leading upwards, delimited by a concave edge and delimited by a convex edge inwards, that is, to the wall which continues farther downwards and towards the outflow. An edge is determined by a particularly strong curvature in a vertical section, so mathematically speaking by an extreme value of the curvature. The cited EP 2 604 761 B1 and also the following embodiment give a more vivid idea.

Such a flow path serves to guide or at least support a specific water flow. The water revolves due to the substantially tangential entry into the bowl interior and is held by the centrifugal forces on the bowl inner wall, but at the same time by gravity (more or less obliquely) pulled down, so that due to variations in the shape of the bowl inner wall corresponding flow leading Properties can be produced.

The tangential inlet direction of the rinsing water is determined by the design of the rinse water inlet, ie through the inlet opening and the subsequent upstream piece of pipe for the rinse water. Such a tangential design of the flushing water inlet is already realized in a different form in the prior art and usually serves the purpose of a rotating Spülwasserströmung in the toilet bowl.

According to the invention, a second or an extension of the known flow path is provided in addition to a flow path known from EP 2 604 761 B1. This second or extended flow path is intended to prevent an overflow direction of at least a portion of the rinse water from undulating, thereby reducing or preventing the above-described "rocking." When a portion of the flow through the flow path is "held" at a certain level, the result is there or downstream of it a less severe slump in the total flow or even a clash of the flow part running on and above the second or extended flow path with a flow part running further down.

From the above longitudinal and transverse axis definition, the rotational movement of the flow in the bowl and the position of certain characteristics of the bowl inner shape shall be described with an azimuthal angle which appears from a certain position in the bowl (in plan view) to the intersection of the axes. namely as an angle to the longitudinal axis. For example, the wall-closest point of the bowl opening lies on the longitudinal axis and thus at 0 ° or 180 ° azimuthal angle. Based on this, there is a lateral area in the area around 90 ° or 270 °.

According to the invention, the rinsing water is to be directed through the inlet opening onto a (in a plan view) concave curvature region of the inner wall of the toilet bowl, for which the inlet opening lies between 80 ° and 180 ° azimuthal angle. Preferably, the inlet opening is at smaller azimuthal angles than 170 °, 160 °, 150 ° or even 140 ° and also preferably at least 90 °. The rinse water flows out in the direction of larger azimuthal angles. In other words, the inlet opening preferably lies in a quadrant upstream of a particularly concave curvature of the bowl opening and aims at this particularly concave location. The background is that with a particularly strong concave curvature in conjunction with a certain residual slope of the bowl inner shape (with respect to a vertical section) stabilizing centrifugal forces the Spülwasserströmung initially relatively stable pass through this curvature, it is assumed that the essential part of the bowl inner shape of extended slightly upwards and there is a corresponding slope. There are exceptions, as mentioned above, typically at the top of the bowl rim in the form of undercuts.

The mentioned and, as a rule, particularly strongly concave curved area of the toilet bowl can be at approximately 180 °, ie at the end point of the longitudinal axis. In individual cases, z. B. bowl shapes with two more curved concave The value may be at a slightly different azimuthal angle, in particular in a range between 150 ° and 210 °, preferably 160 ° and 200, instead of at 180 °, for example in the case of an angular basic shape with rounded corners ° or 170 ° and 190 °. He does not have to fill in these angular ranges.

Now, if the rinse water enters a less curved area of the bowl opening, there is an increasing risk of an undesirably strong sinking or sinking of an undesirably large part.

Such a sinking flow part could then meet the first flow path or the first flow path part provided according to the invention, which runs at least between 90 ° and 270 ° with respect to the azimuthal angle and preferably adjoins the inlet opening at the bottom to guide the water emerging therefrom to be able to. Preferred lower limits for the above angular range are 80 °, 70 °, 60 °, 50 °, 40 °, 30 °, 20 ° and preferred upper limits are 280 °, 290 °, 300 °, 310 °, 320 °, 330 ° and 340 °.

In order to reduce the decrease of a part of the flow, according to the invention a second flow path or a second flow path part is provided, again between an outer concave and an inner convex edge and thereby higher than the azimuthal angle corresponding or next adjacent part of the first flow path / first flow path part. The second flow path or the second part is intended to be provided at least between an azimuthal angle of 310 ° and 340 °. Preferred lower limits are 300 °, 290 °, 280 °, 270 °, 260 °, wherein the second flow path preferably does not begin at angles below 200 °. A preferred upper limit is 345 °, with the second flow path preferably not extending above 400 ° (ie, over 360 °, 40 °), unless it merges into the first flow path anyway.

As already indicated above, the flow path known from EP 2 604 761 B1 according to this invention can either be extended, while remaining with a continuous flow path, or also adding a second flow path. The difference is ultimately whether there is an interruption between the two flow paths or parts or not, in particular one at 0 ° azimuthal angle, which will be discussed in more detail below. In the following, in the description of the second flow path is spoken, which in the case without interruption then to be understood as the second flow path part of the same uniform flow path. The same applies to the first flow path, which is thus already known from EP 2 604 761 B1 without the mentioned interruption, a first part of the flow path and as such (without the second part).

The second flow path should in particular not be completely circumferential, but only cover a limited area, namely where, according to experience, there is a particularly high risk of sinking the water flow running along the shell inner wall. This is especially true for the "fourth quadrant" (counted from 0 ° with ascending azimuthal angle.) As the embodiment illustrates, the second flow path at least partially supports the flushing water flow, thus preventing too much of the "reflection" mechanism already described. at the first flow path.

The previous argument is not dependent on whether the definition of the azimuthal angle with the value 0 start at the front or back, these terms refer to the usual sitting position of a toilet user, "back" so the close-up part of the bowl interior shape (on Moreover, the previous argumentation does not depend on whether the direction of rotation of the flushing water flow in the toilet bowl is left- or right-handed, ie whether the azimuthal angle increases in a clockwise or counterclockwise direction, the more common and preferred case Furthermore, the case is preferred that the azimuthal angle is calculated from the rear, ie, in this preferred case, the rinsing water flow out of the inlet opening on the concave curvature of the toilet bowl interior facing forward (and would be directed backwards, if one defines the zero point of the azimuthal angle ahead). Both are possible, but in particular in connection with a rather behind Sifonablauf the said variant is preferred.

In particular, could be avoided by the inventive second flow path, so to speak, a second or extended shoulder in the bowl inner mold, a partial sloshing out of rinse water from the bowl, even at low or disappearing undercut the bowl inner shape at its upper edge. It should be noted here that the flushing water inlet opening necessarily requires an undercut and, in this connection, an undercut-free bowl interior has an undercut, of course, at the inlet opening, which is the area just below the upper edge of the bowl interior, ie where classic WCs are concerned Bowls of the rinsing edge is arranged.

In principle, the invention aims for the simplest possible, easy to clean (and therefore smooth) and production-favorable form. As already explained, an undercut-free inner bowl shape is therefore preferred in the sense described.

In the same sense, a restriction to the two or one flow path described is preferred, that is, the waiver of more. Although there are no undercuts by the flow paths, in any case preferably not, but they complicate the shape a little and a clever interpretation of Spülwasserströmung by an unnecessarily large number of different flow paths from the perspective of the inventors not easier. Of course, in particular, the first flowpath may have a considerable extent in azimuthal angle, but this does not change the fact that it is a coherent uniform flowpath. The flow paths described with the present invention are intended to carry substantial portions of the flush water flow. This is even more pronounced for the first flow path than for the second, because in the second only one part, namely generally only a part which flows somewhat higher up the bowl inner wall, is caught by the second flow path. In any case, unlike some structures found in the prior art, the two flow paths are relatively distinct in width, the width being understood to be the dimension along the inner wall of the toilet bowl and perpendicular to the longitudinal extent of the flow path, that is, normally with respect to local surface orientation directed downward. Preferred minimum widths at the widest point are 12 cm for the first flow path and 0.8 cm for the second flow path, the following values being 13 cm, 14 cm, 15 cm and the following for the second flow path being 0.9 cm, 1 cm, 1, 1 cm are increasingly preferred in this order.

As explained, the second flow path has less of the task of guiding or assisting a downward rotating flow, but of preventing a portion of the water flow from falling too much. In that regard, it may preferably extend approximately horizontally (in relation to its longitudinal direction). Concretely, reference may be made to a middle line between the mentioned convex and concave edges (in each case related to the extreme values of the curvature), and this center line should preferably have an angle of not more than 15 ° to the horizontal along the flow path, preferably at most 13 °, 1 1 °, 9 °, 7 °. The flow path preferably drops slightly with the direction of flow, that is to say the azimuthal angle.

The first flow path, in turn, essentially corresponds to the explanations in the already cited EP patent 2 604 761 B1 of the same assignee and accordingly proceeds with increasing azimuthal angle, on the one hand sloping and, on the other hand, rotating along the inner shell shape to support a downward and rotating flushing water flow. Accordingly, in this respect, an asymmetrical inner bowl shape is provided, which predefines or generates a downward movement through the bowl inner shape by a lower position of the first flow path on one side than on the other side, similar to a helical shape. Accordingly, the very good surface cleaning properties of a rotating flow in the bowl are combined with a comparatively more pronounced momentum when entering the siphon. As a result, the kinetic energy of the rinse water, for example, as a result of the gradient height compared to a cistern, can be used twice. In addition, the design of the dish interior shape thus follows the gravitational downward tendency of the water flow and avoids a part of turbulence, which are caused by a downflow of the water, regardless of the inner shell shape. Such turbulence reduces the kinetic energy of the rinse water. For similar reasons, for example, a prior art rotating rinse water movement in the bowl for surface cleaning therein is substantially more effective than the conventional solution with a classic rinse edge which degrades much of the kinetic energy of the rinse water entering the rinse water feed. The predominantly known tangential velocity component of the rinsing water which emerges from the inlet opening into the bowl, so to speak, refers to a projection of a central rinsing water path onto a horizontal plane. The rinsing water does not exit the inlet opening in the direction of the water level in the siphon but rather transversely thereto, whereby the precise angle in a general sense does not matter and this may depend on the individual geometry of the inlet opening and the subsequent first flow path , In particular, the velocity of the rinse water exiting the inlet does not have to be exactly horizontal, but it is preferably substantially horizontal.

The WC according to the invention can be used with different methods of rinsing water generation in the sense of supplying a particular rinsing water realize pressure, especially on a pressurized water line, ie without cistern. However, preference is given to the combination with a cistern, because of the invention, the limited potential energy of the rinse water from it can be used very efficiently. This applies in particular to a concealed cistern in a mounting wall behind the toilet.

In particular, the flushing water quantities can be kept relatively small thanks to the invention, which has economic and environmental benefits. Preferably, the maximum amount of flushing water is less than 6 l, preferably less than 5.5 l and most preferably less than 5 l.

The rinsing water flow according to the invention allows a good wetting and rinsing action of the soiled areas of the bowl inner mold, as explained by a rotating and falling flow. Accordingly, a conventional flushing rim, which was initially compared to a shower, can be dispensed with. This makes the toilet bowl easier to manufacture, but also in the cleaning, because classic Spülränder are particularly dirty and calcification-prone and beyond the bottom is very difficult to achieve. In other words, the invention provides the possibility for a smooth transition from the actual bowl interior surfaces to the bowl top, so the upwardly facing surface areas of the toilet bowl, especially under a toilet seat ring.

The already mentioned several times (preferably only) inlet following the flushing water supply can be relatively high in one embodiment of the invention, in particular higher than 5 cm and in the following order increasingly preferably higher than 5.5 cm, 6 cm, 6, 5 cm. With a high inlet opening, a flow-optimized large cross-section can be achieved without impairing the inside of the bowl through the inlet opening too much, both with regard to the flow guidance and to its aesthetic appearance. In general, the flow cross section of the rinse water supply is preferably relatively large. In particular, in an embodiment of the invention along the extent of the flushing water supply within the WC, ie between the inlet opening and the transition to pipe parts outside the actual WC, ie in particular within an installation wall behind it, it can lie over at least 8 cm ² , preferably over 9 cm ² and more preferably over 10 cm ² or even 1 1 cm ² . This applies in particular to the inlet opening. Thus, the kinetic energy of the rinse water due to a gradient or a line pressure can be particularly well exploited.

Furthermore, it is preferred that the second flow path with its beginning at small azimuthal angles of the inlet opening maintains a certain distance, preferably at least 60 ° azimuthal angle, more preferably 80 °, 100 °, 120 °, 130 °. This refers to the case where the first and second flow paths are not uniformly connected and the azimuthal angle is increasing in the direction from the flow path.

The two flow paths each form a local reduction of the otherwise prevailing inclination of the bowl inner mold. According to a preferred embodiment of the invention, they should therefore not be in the back of the dish interior, at least preferably in a definition of the azimuthal angle of zero at this point, ie a flushing water flow from the inlet opening to the front. It has been found that an inside wall which is as smooth and steep as possible in the middle is to be preferred in the rear for the tendency to soiling and from the point of view of the inventors this aspect justifies limiting the flow paths in such a way that they do not cover this rear center , For the sake of illustration, reference is made to the exemplary embodiment. In this case, the first and second flow paths are thus separated from one another.

Furthermore, it has been found that the second flow path should run below a relatively steep part of the bowl inner mold. Accordingly is an inclination angle of at least 70 ° or even 75 ° to the horizontal in this part over the second flow path, preferably between 310 ° and 340 ° azimuthal angle, and preferably along the entire longitudinal extent of the second flow path. Likewise, this statement is valid for a part of the length of the second flow path or for its entire length then for the entire part of the bowl inner shape above, up to an upper edge or rounding, which forms the transition to the top of the toilet body. Furthermore, a relatively pronounced steepness in the already mentioned central rear area of the toilet bowl inner mold is preferred, at least down to the water level level in the siphon and up to the mentioned transition to the bowl top. Again, the already mentioned angle values come into consideration.

Finally, such a steepness, again with the same angle values, is also particularly preferred on the opposite side, ie in the front center, specifically below the first flow path (preferably downwards from the convex edge) up to the water level in the siphon.

Particularly preferred manner, the statements apply to the steep wall in a part of the height for the entire inner bowl shape.

The steep walls support a good cleaning effect and a sufficient downward trend in the water flow. Accordingly, the flow of water should flow into the Sifon with a significant downward tendency in order to be able to flush it out well.

The second flow path or the second flow path part is preferably relatively high in the angular range between 310 ° and 340 °, in particular above the first flow path (the first flow path part), as far as this also preferably exceeds 270 ° azimuthal angle is extended to greater azimuthal angles and into the range at and above 310 ° azimuthal angles. Then, the two flow paths (parts) are spaced apart and arranged one above the other. The second flow path (the second flow path part) is preferably at least 3 cm higher than the first flow path (the first flow path part), the lower limit being 3.5 cm, 4.0 cm, 4.5 cm, 5.0 cm being increasingly preferred , Irrespective of this, the second flow path or the second flow path part in the mentioned azimuthal angle range between 310 ° and 340 ° is preferably higher than the lower edge of the inlet opening for the rinse water, ie again relatively high. Preferably, this lower edge is at least approximately at the same level as the first flow path at this point, that is, the inlet opening injects the water onto the first flow path.

The invention is preferably realized with a toilet bowl, which has at least in the upper region, ie above the first flow path, only a single inlet opening for rinse water. Variants with a plurality of inlet openings are certainly present in the prior art. This complicates the WC body overall clearly and is not really necessary for good rinsing properties. Preferably, this also applies to the rest of the bowl below the first flow path. In this sense, it is preferable to dispense with nozzle openings in the vicinity of the siphon, which are occasionally used in the prior art to improve the drainage performance. The reasons are the same as above, with a limitation of the total water consumption added.

In the following, the invention will be explained in more detail with reference to an exemplary embodiment, wherein the individual features may also be essential to the invention in other combinations and, as already mentioned, implicitly refer to all categories of the invention. Figures 1 and 2 show perspective top views of front right top or front left top on a toilet bowl according to the invention in shades of gray to illustrate the three-dimensional shape;

Figure 3 shows a side view of the right half of the toilet bowl of Figures 1 and 2 in the longitudinal cut state;

Figure 4 shows a side view, but without grayscale and in a cross-sectional state of the toilet bowl of Figures 1-3, with a view towards the rear and in a simplified embodiment;

FIG. 5 shows the exemplary embodiment from FIG. 4 in side views of the same height as those shown in FIG. 3, but without gray scales;

Figure 6 shows in plan view the embodiment of Figures 4 and 5 together with the Azimutalwinkeleinteilung, which is also intended to understand the first embodiment. Figures 1 to 6 show the invention with reference to two toilet bowls, wherein the first embodiment is designed in Figures 1 to 3 for the installation of a shower device of a shower toilet and the corresponding recesses and openings in the second embodiment in Figures 4 to 6 are omitted. For the invention, these differences are not of particular concern, but illustrate that the invention can also be combined very favorably with a shower toilet.

Figures 1 and 2 show in perspective oblique views of the toilet bowl 1 of the first embodiment with a conventional bowl opening 2, a rear side (that is in Figure 1 top right on the top and in Figure 2 top left) breakthrough 3 for the installation of a (not shown) shower unit and with a lowering 4 of the upper edge of the toilet bowl at the rear of the bowl rim around the bowl opening 2 for the passage of a shower arm (not shown) of the shower fixture. Hereinafter interested by the bowl opening 2 visible inner shape of the toilet bowl. 1 This initially corresponds qualitatively to the WC bowl known from the cited EP 2 604 761 B1 in that an approximately helical first flow path 5 is provided, which in this case starts at the rear and slightly offset to the right, for example at 10 ° azimuthal angle and in continuously sloping form with a widest point at an azimuthal angle of 180 ° almost all the way around to about 350 ° azimuthal angle, so back again, but slightly offset to the left, runs. Their function corresponds to the descriptions in the cited prior art and earlier in this description and need not be explained in detail. Notwithstanding the cited prior art, however, here is the inlet opening 6 for the rinse water not back (slightly offset right) and directed to the left, as stated in the prior art, but begins laterally at about 100 ° azimuthal angle and is directed forward, ie towards larger azimuthal angles. Accordingly, the rinse water is applied to the first flow path, but not at its start (at 10 °). Incidentally, for better understanding, the azimuthal angles mentioned here can be referred to FIG.

Further, in addition to the cited prior art in the rear left corner, so clearly visible in Figure 1, a second flow path 7, to some extent a further shoulder in the bowl inner wall above the first flow path 5, is provided. This second flow path 7 also strictly defines itself as an inner wall area between an (upper and outer) concave edge and a (lower and inner) convex edge. The second flow path 7 extends with respect to the azimuthal angle between about 250 ° and about 350 °. It is also designed slightly sloping, with an approximate inclination (based on a non-drawn center line between the convex and the concave edge) of about 5 ° in horizontal view direction. At its widest point it is about 1, 2 cm wide, while much less flat than the first flow path 5, namely at an angle of about 48 ° to the horizontal at the shallowest point. The first flow path 5 has in contrast z. B. 180 °, an inclination of only about 1 1 ° relative to the horizontal at a maximum width of 16 cm. The mentioned width refers to the distance between the mentioned edges (convex and concave line), as a straight distance between them along the steepest slope, ie as the shortest distance. The bowl inner walls above and below the second flow path 7, however, are quite steep with an inclination relative to the horizontal of about 80 °, especially at an azimuthal angle of 0 °. As shown particularly in FIG. 3 and FIG. 4, the bowl walls thereof become steeper towards the front, and the inclination amounts to approximately 89 ° at an azimuthal angle of 180 °. So she avoids just an undercut.

Overall, the bowl inner shape so that, as the figures also show no undercut, especially not at the top (and of course with the exception of the inlet opening 6).

The two flow paths 5 and 7 in this embodiment have a distance of about 6 cm, which is measured as the web width, namely between the convex edge of the upper flow path 7 and the concave edge of the lower flow path 5 and in the direct following the inclination direction. The second flow path 7 is thus significantly increased in relation to the first flow path 5.

It can be imagined on the basis of the figures that a water flow emerging from the inlet opening 6 runs as a result of the centrifugal force to a substantial extent along the steep bowl inner wall above the first flow path 5 and in this form through the (in vertical plan view) concave bowl inner wall to the other, namely left side is brought. Experience shows that the flow of water on the left side tends increasingly downward as a result of gravity and in particular on the part of the first flow path 5 at low azimuthal angles, ie about 10 ° to 90 °, but also already on the opposite part of the first flow path 5 at large azimuth angles, ie at about 300 ° to 350 °. This leads to a reflection-like flow behavior in which parts of the rinse water tend strongly upwards and can spill out of the bowl 1.

If, as a result of the second flow path 7 in the illustrated azimuthal angle range, in particular between 310 ° and 340 °, this downward tendency is counteracted by a certain obstacle, the described behavior is damped or prevented and thus an undercut-free bowl interior shape with a flow behavior of the Rinse water without danger of Schwaps realize. The expanded with respect to the azimuthal angle and in terms of inclination in vertical sections (by the barrier water level in the drain pipe as in Figure 3) flat configuration of the first flow path 5 is again desired to promote the rotating character of Spülwasserströmung possible and with the smallest possible Spülwassermengen optimum wetting To reach interior walls of the bowl.

Figure 4 shows on the one hand a side view of the rear portion of the bowl inner mold and on the other hand a section through the bowl. The cutting plane passes through the water level in the lowest part of the toilet bowl, which is marked with 8. In the left part of the bowl inner mold you can see the second flow path 7 and in the right part of the first flow path 5. Both are each characterized by boundary lines of the CAD program, the surfaces with vertical section (through the barrier water level 8) straight cutting profile, such. B. the steep bowl inner wall above the flow paths 5 and 7, separates from curved surfaces. In that regard, it can be seen that the two flow paths 5 and 7 actually have a middle in this sense straight strip, followed by the top and bottom of each curved strip. Figure 6 shows in plan view the second embodiment of Figures 4 and 5 with the Azimuthalwinkeleinteilung and some values. In particular, it can be seen that 0 ° corresponds to the rear center of the bowl inner shape and 180 ° of the front center. It can be seen in the claims defined Azimutalwinkelbereich for the flushing water inlet opening between 80 ° and 180 °. One can also see the front azimuthal angle range between 150 ° and 210 °, in the claim according to a concave curvature should be present (not necessarily over this entire angular range), is directed to the incoming rinse water. Furthermore, between 90 ° and 270 °, the minimum range for the flow path can be seen. Further, in the clockwise direction, a little offset from the drawn line at 300 ° and in the same sense offset next to the line at 330 °, the limits of the minimum range (between 310 ° and 340 °) for the second part or the second flow path, the claim should not extend beyond the angular range between 230 ° and 90 °.

In addition, FIG. 6 additionally illustrates, as a plan view, the inner shell shape explained with reference to the previous figures, wherein no reference signs are drawn in to avoid overloading.

Claims

claims

WC with a toilet bowl (1), and an oval or round bowl opening (2), and an inlet opening (6) for rinsing water,

wherein, in plan view, a longitudinal axis along a longitudinal extension of the oval and a transverse axis extending perpendicularly and centrally define a center point and, starting from the longitudinal axis and the center point, an azimuthal angle,

wherein the inlet opening (6) is provided for the rinse water with respect to the azimuthal angle between 80 ° and 180 ° and is oriented in the direction of greater azimuthal angle and thereby a tangential inlet direction of the rinse water is provided in plan view and with respect to the shape of the bowl opening (2) .

so that the rinse water after entering the toilet bowl (1) through the inlet opening (6) on an inner wall of the toilet bowl (1) flowing in a plan view and based on the center concave curvature of the inner wall at an azimuthal angle of 150 ° to 210 ° hits,

wherein the toilet bowl (1) has a in the inner shape of the toilet bowl (1) between a vertical section and based on the center outer concave edge and an inner convex edge defined flow path (5) for the rinse water at the bottom of the Adjacent inlet and which extends relative to the azimuthal angle at least between 90 ° and 270 °, characterized in that a flow path (7) also between 230 ° and, once over 360 ° away, 90 ° azimuthal angle, but not beyond, but at least between 310 ° and 340 ° azimuthal angle, which is also defined in the inner shape of the toilet bowl (1) between a vertical in relation to the center outer concave and an inner convex edge and thereby higher than a terer part of the first-mentioned flow path (5) at the same azimuthal angle.

2. Toilet according to claim 1, with an upper edge of the toilet bowl (1), which forms no undercut inside, in particular with an exception of the inlet opening (6) undercut toilet bowl (1).

3. Toilet according to claim 1 or 2, which exclusively in claim 1 in) flow path (s) (5, 7), so no further flow path having.

4. Toilet according to one of the preceding claims, wherein the flow path (5) between 90 ° and 270 ° azimuthal angle at its widest point is at least 12 cm wide and / or the flow path (7) between 310 ° and 340 ° azimuthal angle at its widest Spot is at least 0.8 inches wide.

5. Toilet according to one of the preceding claims, wherein the second flow path (7) extends horizontally with a maximum deviation of +/- 15 °, preferably somewhat sloping with increasing azimuthal angle.

6. Toilet according to one of the preceding claims, wherein the flow path (5) between 29 ° and 270 ° azimuthal angle slopes and thus supports a downward movement of the inlet opening (6) occurred Spülwasser, wherein the inlet opening (6) next adjacent Parts of the flow path (5) between 90 ° and 270 ° azimuthal angle higher than those of the remaining flow path (7) between 310 ° and 340 ° azimuthal angle next adjacent parts.

7. Toilet according to one of the preceding claims, wherein the flow path between 310 ° and 340 ° azimuthal angle and the flow path between 90 ° and 270 ° azimuthal angle over 0 ° away continuously merge into each other and thus form a total flow path.

8. Toilet according to one of claims 1 to 6, wherein the azimuthal angle of 0 ° with respect to a seated posture of a toilet user behind, so close to the gutter, and at this position of 0 ° no flow path (5, 7) exists, wherein the flow path (5) between 90 ° and 270 ° and the

Flow path (7) between 310 ° and 340 ° azimuthal angle two separate flow paths (5, 7).

9. Toilet according to one of the preceding claims, wherein the toilet bowl inner shape over the flow path (7) between 310 ° and 340 °

Azimuthalwinkel has a slope of at least 70 ° to the horizontal.

10. Toilet according to one of the preceding claims, wherein the azimuthal angle of 0 ° with respect to a seated posture of a toilet user behind, so close to the gutter, and in which the inner shape of the toilet bowl (1) at this azimuthal angle of 0 ° between a Sifonwasserstandsoberkante (8) and an upper-side transition to the bowl top has a slope of at least 70 ° to the horizontal.

1 1. Toilet according to one of the preceding claims, wherein the azimuthal angle of 0 ° with respect to a seated posture of a toilet user behind, so close to the gutter, and in which at an opposite location, ie at an azimuthal angle of 180 °, the inner shape of the bowl (1) between a flow path (5) defining the convex edge and from there down to a Sifonwasserstandsoberkante (8) has a slope of at least 70 ° to the horizontal.

12. WC according to one of the preceding claims, wherein the flow path (5) between 90 ° and 270 ° azimuthal angle to larger azimuthal angles is continuously extended and at least partially at the same Azimutalwinkeln as the flow path (7) between 310 ° and 340 °, however spaced from and under this runs.

13. WC according to one of the preceding claims, wherein the flow path (7) between 310 ° and 340 ° azimuthal angle is higher than a lower edge of the inlet opening (6) for the rinse water.

14. Toilet system with a toilet according to one of the preceding claims and a cistern, preferably concealed cistern, preferably with a flush volume below 6 I.

15. The use of a toilet or a toilet system according to one of the preceding claims for rinsing, wherein the rinse water from the inlet opening (6), starting a rotating movement along the flow path (5) and thereby carrying a portion of the rinse water through the flow path (7 ) is guided between 310 ° and 340 °.