EP2233651B1 - Flush device for a water closet and method of operating such a device - Google Patents

Description

The invention relates to a toilet bowl with a flushing device according to the preamble of claim 1.

The consumption of rinse water can be significantly reduced in a toilet, if according to the WO 95/04196 Applicant during a rinse the water present in the siphon arc is set in motion with a so-called jet nozzle. With the water discharged through the nozzle into the siphon at a comparatively high speed, the siphon water can be accelerated, so that the siphon is better rinsed out. The disadvantage is that additional noise is generated by the water injected into the siphon and the effect of the jet nozzle can be at least greatly reduced by solids in the siphon.

By the EP-A-1034338 a water closet has become known, which has a so-called jet nozzle. Through the nozzle, a mixture of water and air is injected into the bottom of the toilet keys. At the front end of the nozzle a vacuum chamber is arranged to ensure that the water-air mixture is channeled in the direction of the axis of the inlet of the siphon, as mentioned in paragraph [0027]. The injection of said mixture should also cause additional noise.

The US 1,785,198 discloses a generic toilet bowl with a flushing device, wherein the rinse water is distributed to openings in the flushing rim, a plurality of annularly arranged openings in the siphon and an opening directed vertically downwards in the siphon. The openings in the flushing rim and in the siphon are inclined, so that in the basin and in the siphon a Spülwirbel can be generated, which rinses without suction and without vacuum or partial vacuum.

The WO 2008/024005 discloses a flushing device which according to FIGS. 12 to 14 has at the bottom of the siphon a nozzle with closely arranged openings with which a narrow laminar flow (FIG. 13A) can be produced at the bottom of the siphon.

Studies have shown that in the presence of solid components in the siphon, the accelerating effect of the jet nozzle is greatly reduced.

The invention has for its object to provide a toilet bowl with a flushing device of the type mentioned, which avoids the disadvantages mentioned.

The object is achieved according to claim 1 and according to claim 8.

In the toilet bowl according to the invention with a flushing device, a flow having a substantially higher pulse density can be generated in the water of the siphon bend. The pulse density is much higher than that which can be generated with only one nozzle. The pulse generated in the inventive flushing device is also much more stable and is deflected much less by obstacles in the siphon. The generated flow cone is passed in the intended direction of action and concentrated. This leads to a more efficient transport away from solid objects. It has also been found that in the inventive flushing device during flushing significantly smaller air bubbles in the siphon and correspondingly finer turbulence arise. The noises are correspondingly deeper and less disturbing than the high noises that are generated when using only one jet nozzle. Finally, it has been shown that the desired suction function is built up much faster.

According to the invention, it is provided that at least one of the plurality of nozzles or the annular gap is arranged immediately before or in an ascending region of the siphon arc. The nozzle or the annular gap is thus arranged at or after the apex of the siphon arc. As a result, a particularly effective suction effect can be generated. The pulse generated by the nozzles or by the annular gap can cause the residual water and the solids in the siphon are sucked into the outlet pipe to replace the ejected water. This process continues until the entire contents of the toilet keys are flushed out and the water supply to the nozzles or to the annular gap is switched off.

Preferably, more than two nozzles are distributed over the circumference of the siphon bows. In principle, however, an embodiment with only two nozzles is conceivable. in this connection the two nozzles are arranged approximately diametrically opposite. In particular, a nozzle at the bottom and a nozzle are arranged at the top. The annular gap preferably extends substantially and in the entire circumference of the siphon arc. It is also conceivable, however, an embodiment in which the annular gap extends only around a part of the circumference, for example, around half of the circumference. Also conceivable is a design with more than one annular gap.

According to the invention, it is provided that a distributor ring is arranged on the circumference of the siphon arc, with which at least two nozzles or the annular gap are connected. Such a distributor ring makes it possible to distribute the distribution of the water or another fluid provided on the plurality of nozzles or on the annular gap. Such a distributor ring runs in the wall of the siphon arc or at a distance to the outside of the siphon arc. The supply then preferably takes place via an inlet pipe, which is connected to the connection nozzle.

According to a development of the invention, it is provided that the nozzles or the annular gap is provided for the supply of water, air or a mixture of water and air. Preferably, the nozzles are provided for injecting water at a comparatively high pressure. In principle, however, the water present in the siphon could also be accelerated with air or a mixture of water and air.

After emptying or already during the emptying of the siphon, the toilet key is preferably cleaned in the region of the inlet by means of a main rinse. In addition, it is provided to fill the siphon after emptying again with rinse water. The water for accelerating the water in the siphon can for example be supplied from a cistern. The cistern can also provide the water for the main rinse. The cistern may in this case be a conventional gravitational cistern or a spin rinse. Part of the water will then be the said nozzles or at least one of them. Annular gap and another part fed to the inlet of the toilet bowl.

The invention also relates to a method for operating a toilet bowl with a flushing device. It is provided that the water present in the siphon arc is accelerated towards the outlet with the plurality of nozzles or with the annular gap. The acceleration of the water is thus not with only one nozzle, but with multiple nozzles or with an annular gap. There are provided a plurality of nozzles, then a plurality of flow cones are formed correspondingly in the siphon arc, which are each directed substantially against the outlet.

The generation of the pulse in the siphon arc can be carried out simultaneously with the main rinse or the main rinse and the pulse generation take place successively.

Further advantageous features emerge from the dependent claims, the following description and the drawings.

Embodiments are explained below with reference to the drawing.

Fig. 1

schematisch eine Ansicht einer erfindungsgemässe Klosettschüssel mit einer Spülvorrichtung;

Fig. 2

eine weitere schematische Ansicht der erfindungsgemässen Klosettschüssel mit einer Spülvorrichtung, wobei im Siphonbogen vorliegendes Wasser beschleunigt ist;

Fig. 3

eine schematische Ansicht einer Klosettschüssel mit einer Spülvorrichtung gemäss einer Variante;

Fig. 4

schematisch ein Teilschnitt durch einen. Siphonbogen nach dem Stand der Technik;

Fig. 5

einen Teilschnitt durch einen Teil eines Siphonbogens gemäss der vorliegenden Erfindung; und

Fig. 6

schematisch eine Ansicht einer Klosettschüssel mit einer nach einer weiteren Variante.

Show it:

Fig. 1

schematically a view of a toilet bowl according to the invention with a flushing device;

Fig. 2

a further schematic view of the toilet bowl according to the invention with a flushing device, wherein water present in the siphon is accelerated;

Fig. 3

a schematic view of a toilet bowl with a flushing device according to a variant;

Fig. 4

schematically a partial section through a. Siphon arc according to the prior art;

Fig. 5

a partial section through part of a siphon sheet according to the present invention; and

Fig. 6

schematically a view of a toilet bowl with one of a further variant.

The in the FIGS. 1 and 2 shown flushing device 1 has a toilet bowl 2, For example, ceramic, which has an inlet 3 and an outlet 18. Between the inlet 3 and the outlet 18 a siphon bend 4 is arranged, is stored in the water 13, which forms an odor trap. The outlet 18 is arranged at the end of a discharge pipe 5, which is connected in the usual way to a disposal line. During the flushing process, water is supplied in the direction of the arrows 6, as in the case of the customary flushing channel (not shown here). In addition, the present in the Siphonbogen 4 water 13 is accelerated by means of a pulse nozzle device 8. With the impulse nozzle device 8, a plurality of flow cones 15 are generated in the water 13, which are directed against the outlet 18. These flow cones 15 push the present after the pulse nozzle device 8 water 13 against an interior 22 of the outlet pipe 5 and thus upwards and against the outlet 18. The remaining water present in the siphon 4 water 13 is thereby sucked and also accelerated towards the outlet 18 out. In this case, present solid 20 are entrained in the siphon sheet 4 and also transported to the output 18 out. If the siphon bend 4 is substantially empty, then it is refilled by the water supplied via the scavenging duct at the inlet 3. This water forms the main rinse and through this an inside 23 of the toilet bowl 2 is cleaned.

The impulse nozzle device 8 has a distributor ring 11, which is in accordance with FIG. 1 extends around the siphon 4 around. This distributor ring 11 is connected via an inlet pipe 10 with a line not shown here. This line is, for example, a water pipe which is connected to a cistern, not shown here, for example, a pressure cistern or a conventional gravity based cistern. The inlet pipe 10 is arranged as shown in the lower region of the distributor ring 11. The water thus flows through the inlet tube 10 from below into the distributor ring 11 and is distributed in this to a plurality of nozzles 12. These nozzles 12 open at an inner side 21 of the siphon bend 4 in the interior 22 of the toilet bowl. An orifice 25 is located according to FIG. 2 Another orifice 24 is located in an ascending region 4b of the siphon arc 4. There are at least two nozzles 12, which are preferably approximately diametrically opposed, as shown. However, it is also possible to provide more than two nozzles 12, for example three, four or even more nozzles 12. These are on the circumference of the Siphonbogens 4th distributed. The distribution is uniform. The generated impulse, or flow cone, is thus not only punctiform but is generated at several points, so that the water radiating from the nozzles 12 has a considerably higher impulse density and thus very high dynamic forces can be exerted on the water 13. At least a portion of these forces are exerted on the water 13 after the apex of the siphon bow 4, so that said suction effect is generated. The suction is applied until substantially all of the contents of the siphon sheet 4 are flushed out. Since a plurality of nozzles 12 are provided, the various flow parameters can be aligned with the siphon sheet 4.

The FIG. 3 shows a flushing device 1 ', which differs from the flushing device 1 by the formation of the pulse nozzle device 8'. This pulse nozzle device 8 'also has several, that is, at least two nozzles 12', which are arranged here, however, only after the apex of the siphon sheet 4 and thus in the ascending region 4b. This arrangement produces a particularly high suction effect, in which the water 13 present in the rising region 4b moves upwards and thus towards the outlet 18, or is accelerated. The water 13 present in the lower region 4c and in the region 4a is also moved toward the outlet 18 due to the suction effect. Since the nozzles 12 'are arranged in front of the solid 20, the flow cone 15 generated by the nozzles 12' can not be deflected by this.

Based on FIGS. 4 and 5 The difference between a pulse nozzle device with only one nozzle and a pulse nozzle device 8 according to the invention will now be explained.

The FIG. 4 shows a siphon sheet 4, in which the water 13 is accelerated by means of only one nozzle 17 in a known manner. The water flowing into the siphon bend 4 forms a flow cone 14. Located in the flow direction after the nozzle 17, a solid 20, the flow cone 14 is deflected and may possibly even be directed against the flow direction. The inflowing water often forms air bubbles 16 'and corresponding turbulence. These turbulences are comparatively large and produce a comparatively high noise.

In the inventive flushing device, as explained above, a plurality of essentially concentric flow cones 15 are formed in the siphon bend 4. These also generate turbulence and air bubbles 16. It has been found that these turbulences produce a much lower noise and the air bubbles 16 are smaller than in the prior art according to FIG. 4 , It has also been shown that a buildup of the suction function takes place over a comparatively short distance 18. This route 18 is considerably shorter than the route 18 'according to FIG. 4 , With the multiple flow cones 15 a much more efficient transport away a solid 20 is possible. Accordingly, a certain self-cleaning of the siphon sheet 4 can be achieved. With the flow cones 15, adapted to the siphon bend 4, a flow pressure of, for example 0.04 bar and a higher flow pressure can be achieved. By appropriate arrangement of the nozzles 12 and 12 ', this flow pressure can be optimized.

The FIG. 6 shows a flushing device 1 ", which differs from the flushing devices 1 and 1 'by the formation of the pulse nozzle device 8". Instead of the plurality of nozzles 12, or 12 ', here at least one annular gap 19 is provided, which opens at the inner side 21 in the interior 22 of the siphon bend 4. Instead of a plurality of flow cones 15, an annular flow cone is produced here, which likewise has the effect of accelerating the water present in the rising region 4b towards the outlet 18. The effects are comparable to the flow cones 15 created with the impulse nozzle devices 8 and 8 '. The annular gap 19 is comparatively narrow, so that water flows into the interior 22 at a comparatively high speed and energy. The annular gap 19 may extend around the entire circumference of the siphon arc or around a part of the circumference. Also conceivable is a design with a plurality of annular gaps 19. It is conceivable, for example, a design with two approximately diametrically opposed annular gaps 19th

The impulse generated by the impulse nozzle device 8, 8 'or 8 "can be synchronous with the main purging, but it is also conceivable that the impulse and the main purging be applied one after the other.in particular, the impulse in the siphon bend 4 can take place before the main purging is triggered.

LIST OF REFERENCE NUMBERS

1

flushing

2

Toilet key

3

inlet

4

siphon

5

outlet pipe

6

arrow

7

arrow

8th

pulse jet

9

arrow

10

inlet pipe

11

distribution ring

12

jet

13

water

14

flow cone

15

flow cone

16

bubbles

17

jet

18

outlet

19

annular gap

20

solid

21

inside

22

inner space

23

inside

24

muzzle

25

muzzle

Claims (18)

1. Toilet bowl (2) having a flushing arrangement for a WC, wherein the toilet bowl (2) has an inlet (3) and an outlet (18) and between these, in a U-bend (4), means (12) for generating a pulse with which water which is present in the U-bend (4) and forms an air trap can be accelerated, for a flushing operation, in the direction of the outlet (18), wherein the means (12) for generating a pulse have a plurality of nozzles (12, 12'), with which in the aforementioned water (13) in each case, a flow which is directed substantially towards the outlet (18) can be generated, wherein the plurality of nozzles (12, 12') is arranged directly upstream of, or in, an ascending region (4b) of the U-bend (4) such, that during flushing a flow which is directed substantially towards the outlet (18) is generated in the water, characterized in that a distributor ring (11) is arranged at the circumference of the U-bend (4), which is in connection with the plurality of nozzles (12, 12'), wherein two nozzles are located approximately diametrically opposite one another, or wherein more than two nozzles are uniformly distributed over the circumference, and that the distributor ring (11) runs at a distance apart from the outside of the U-bend.
2. Toilet bowl (2) having a flushing arrangement according to Claim 1, characterized in that all the nozzles (12, 12') are arranged in the ascending region (4b) of the U-bend (4).
3. Toilet bowl (2) having a flushing arrangement according to one of Claims 1 to 2, characterized in that the distributor ring (11) is connectable via an inlet pipe (10) to a line, wherein the inlet pipe (10) is arranged in the bottom region of the distributor ring (11).
4. Toilet bowl (2) having a flushing arrangement according to one of Claims 1 to 3, characterized in that the nozzle chamber (12, 12') is provided for the feeding of water, air or a mixture of water and air.
5. Toilet bowl (2) having a flushing arrangement according to one of Claims 1 to 4, characterized in that the toilet bowl (2), in the region of the inlet (3), has means for a main flushing operation.
6. Toilet bowl (2) having a flushing arrangement according to one of Claims 1 to 5, characterized in that it has a flushing cistern which is connected to the toilet bowl (2) and with which water can be fed with the least two nozzles (12, 12').
7. Toilet bowl (2) having a flushing arrangement according to Claim 6, characterized in that the flushing cistern is a pressure flushing cistern, and in that this has a line to the at least two nozzles (12, 12').
8. Toilet bowl (2) having a flushing arrangement for a WC, wherein the toilet bowl (2) has an inlet (3) and an outlet (18) and between these, in a U-bend (4), means (12) for generating a pulse with which water which is present in the U-bend (4) and forms an air trap can be accelerated, for a flushing operation, in the direction of the outlet (18), wherein the means (12) for generating a pulse have at least one annular gap (19) extending in the circumferential direction of the U-bend (4), which can be used to generate, in the aforementioned water (13) in each case, a flow which is directed substantially towards the outlet (18), that the at least one annular gap (19) is arranged directly upstream of, or in, an ascending region (4b) of the U-bend (4) such, that during flushing a flow which is directed substantially towards the outlet (18) is generated in the water, characterized in that a distributor ring (11) is arranged at the circumference of the U-bend (4), which is in connection with the annular gap (19), wherein the annular gap (19) extends around the entire circumference, or around part of the circumference, of the U-bend (4), wherein the annular gap opens out, on the inner side (21), into the interior (22) of the U-bend.
9. Toilet bowl (2) having a flushing arrangement according to Claim 8, characterized in that the at least one annular gap (19) is arranged in the ascending region (4b) of the U-bend (4).
10. Toilet bowl (2) having a flushing arrangement according to one of Claims 8 to 9, characterized in that the distributor ring runs in the wall of the U-bend or at a distance apart from the outside of the U-bend and/or that the distributor ring (11) is connectable via an inlet pipe (10) to a line, wherein the inlet pipe (10) is arranged in the bottom region of the distributor ring (11).
11. Toilet bowl (2) having a flushing arrangement according to one of Claims 8 to 10, characterized in that the annular gap is provided for the feeding of water, air or a mixture of water and air.
12. Toilet bowl (2) having a flushing arrangement according to one of Claims 8 to 11, characterized in that the toilet bowl (2), in the region of the inlet (3), has means for a main flushing operation.
13. Toilet bowl (2) having a flushing arrangement according to one of Claims 8 to 12, characterized in that it has a flushing cistern which is connected to the toilet bowl (2) and with which water can be fed to the annular gap (19).
14. Toilet bowl (2) having a flushing arrangement according to Claim 13, characterized in that the flushing cistern is a pressure flushing cistern, and in that this has a line to the annular gap (19).
15. Method of operating a toilet bowl (2) having a flushing arrangement according to one of Claims 1 to 7 or a flushing arrangement according to one of Claims 8 to 14, characterized in that, during flushing, the at least two nozzles (12, 12') or the annular gap (19) form concentric flow cones or one concentric flow cone, respectively, which accelerate or accelerates the water which is present in the U-bend in the direction of the outlet and built up or builts up a suction function in the water of the U-bend, such that rest water and solid matter which is present in the U-bend is taken in by suction into the waste pipe.
16. Method according to Claim 15, characterized in that, during flushing, a plurality of flow cones (15) or a concentric flow cone are formed or is formed in the U-bend (4), respectively, these or this being directed substantially towards the outlet (18).
17. Method according to Claim 15 or 16, characterized in that, during flushing, the toilet bowl (2) is flushed by a main flushing operation, and in that this is coordinated with the pulse generated in the U-bend (4).
18. Method according to Claim 17, characterized in that the main flushing operation and the aforementioned pulse are generated one after the other or substantially simultaneously.

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