WO2000066841A1 - Water-saving toilet arrangement - Google Patents

Abstract

The toilet arrangement is provided with an outlet (14) which is provided with an essentially vertical area (17) that has a free cross-section (C) being smaller than the cross-section of another area (A) which is arranged above said area, whereby the area (A) pertains to the outlet (14). More water flows into than out of said vertical area (17) when the flush is used. A closed water flow (27') is produced in the vertical area (17). Said water flow (27') essentially sucks all the liquid away from the stink trap (10). The arrangement enables flushing with less water involved and can still be produced in a cost-effective manner.

Description

 Water-saving toilet facility

The invention relates to a water-saving toilet system, with an odor trap having a basin and a flushing device with which the basin can be flushed and with a drain, which is arranged in the flow direction after the odor trap and is to be connected to a disposal line and through which flushing water is also transported during flushing Parts of the disposal line can be supplied.

Efforts to reduce water consumption when flushing toilet facilities are very old. As early as 1888, US 380,854 proposed a toilet system which has a vacuum source with which a vacuum is generated with each flush, which is intended to intensify the suction process. Another vacuum toilet is also proposed by US 5,487,193. A flexible membrane separates a water chamber from a vacuum chamber. By means of a spring, this membrane is suddenly moved during a rinsing process. On the one hand, rinse water is conveyed and on the other hand a negative pressure is generated in the drain. This is also intended to improve the rinsing effect with the aim of still achieving an adequate rinsing effect with less rinsing water.

A water-saving flushing device for a toilet is proposed by DE 298 07 813 Ul. In order to be able to effectively flush a toilet with comparatively little flushing water, there is a nozzle in the bottom of the odor trap through which part of the winding water is injected diagonally into the outlet during a winding process. The nozzle is located at a front end of a discharge slope, so that a negative pressure is generated in the drain when a bent discharge pipe is full. A downward pulling force of the watercourse is to be increased by the nozzle.

Vacuum toilets have the disadvantage that a vacuum source has to be installed, which is comparatively complex and takes up additional space. In addition, noises during vacuum actuation can hardly be avoided. In the case of toilet facilities with a nozzle in the odor trap, corresponding lines to this nozzle are required. This nozzle significantly increases the cost of manufacturing the toilet bowl. In addition, the nozzle can become clogged, which leads to malfunctions.

The invention has for its object to provide a water-saving toilet system which avoids the disadvantages mentioned above and which is nevertheless effective and reliable and inexpensive to manufacture.

The object is achieved in a toilet installation of the type mentioned in that the drain has an essentially vertical area which has a smaller free cross section than a further area of the drain arranged above this area, such that in the case of a flushing m the vertical Area more water flows in than away from it and a closed water flow forms which essentially sucks the odor trap.

With the water-saving toilet system, neither a vacuum source nor a nozzle in the odor trap is required. The essential features of the invention relate to the process. According to a further development, this can essentially be formed by a flow sheet which len area with the comparatively small free cross section and which can be attached to any common toilet bowl. A major advantage of the invention is thus seen in the fact that such a drainage sheet is attached to existing toilet bowls and thus a reduction in water consumption is possible very cost-effectively. The drain elbow can be made of plastic as a molding and enables very different installation situations. In particular, a floor drain or a wall connection is possible. For the floor drain, the drain pipe runs through the building floor and for the wall connection through the building wall. Tests have shown that efficient rinsing with about 4.5 liters of rinsing water or even less is possible. According to a further development of the invention, the drain has a deflection bend below said vertical area, which has a free cross-section that is larger than the free cross-section of said vertical area.

The invention also relates to a drain elbow for a water-saving toilet system. This is preferably a fitting that runs horizontally at the upper end for connection to a nozzle of a toilet bowl. At this end the drain elbow can be attached to the nozzle of the bowl. A horizontally running region is preferably also provided at the lower end of the drain bend. In the horizontal area there is a deflection bend, which forms a so-called swamp after winding. The free cross section of the deflection bend is larger than the free cross section of the vertical area. In the lower horizontal area, the drain elbow is connected to the disposal line. As mentioned, this can run vertically through the building floor or horizontally through a building wall. Further advantageous features result from the dependent claims, the following description and the drawings.

An exemplary embodiment of the invention is explained in more detail below with reference to the drawings. Show it:

Figure 1 schematically shows a vertical section through a toilet system according to the invention, Figure 2a schematically shows a view of the rear of the

1, Figure 2b shows a section through the lower part of a toilet

Flow sheet, FIGS. 3 to 9 schematically show individual steps of the winding process, FIG. 10 schematically in partial section a toilet installation with a drain sheet according to a variant, FIG. 11 a view of the drain sheet according to FIG

10, FIG. 12 a further, partially sectioned view of the arch according to FIG. 11,

Figure 13 schematically shows a view of the back of a

14 a top view of the installation according to FIG. 13,

Figure 15 is a partial section through the flow sheet of the

Installation according to FIG. 14 and FIG. 16 a section through the upper end of the drain bend according to FIG. 15.

The toilet system 1 contains a toilet with a bowl 8, which is made of ceramic or plastic, for example. The bowl 8 is fastened, for example, to a support frame 6 which has two cross members 6b, to which the bowl 8 is fastened, for example screwed on. The frame 6 has feet βa at the lower end, which stand on a building floor 7 and are fastened to it. As FIG. 1 shows, the support frame 6 is arranged at a distance from a building wall 33. In the space between the building wall 33 and the support frame 6 there is a drain bend 14, which is connected at its lower end 19 to a disposal line 21 via an intermediate piece 20. However, a wall connection (not shown here) is also possible, in which a correspondingly shaped intermediate piece 20 connects the lower end 19 to a disposal line in the building wall 33.

For winding the toilet bowl 8, a bobbin box 2, which is shown only schematically in FIG. 1, is provided, which has at least one button 3 for bobbin actuation and which is filled again via a supply line 4 after the bobbin winding process. The flush box 2 can, however, also be replaced by a pressure line or another flushing device.

The rinsing water flowing out of the flushing box 2 reaches a winding channel 9 at the upper edge of the bowl 8 via a discharge bend 5 and finally m into the basin-shaped interior 34 of the bowl 8 via nozzles 9a. A winding process basically includes cleaning the bowl 8, the removal the faeces and refilling an odor trap 10. The individual steps of the winding process are discussed in more detail below.

A cylindrical neck 12 is formed on the rear wall 8a of the bowl 8, which has a free cross section A and which is arranged after the odor trap 8 as seen in the direction of flow. A preferably circular opening 12a of the connector 12 leads the outlet bend 14, which is connected to the connector 12 with an upper, essentially horizontal end 15. A rubber elastic seal sleeve 13 seals the connector 12 against the outlet bend 14. The end 15 leads over a bend 16 m to a vertical region 17 which has a free cross section C and, as can be seen, is arranged behind the support frame 6. As can be seen, the vertical region 17 is substantially longer than it is wide and leads at the lower end to a deflection curve 18 which is connected to a horizontal outlet end 19 after a rising region 18a. The deflection bend 18 is preferably formed by an arch piece 25 which is molded onto the vertical region 17 and the outlet end 19. The drain bend 14 thus forms a unit with the deflection bend 18 and the drain end 19. The drain arch 14 is preferably made of plastic, but in principle another material, for example metal, is also conceivable.

The drain end 19 has a circular opening 19a through which the arch 14 is connected to the intermediate piece 20

The free or hydraulic cross sections A and C are of particular importance in the process. The free cross-section C is substantially smaller than the free cross-section A of the connector 12. Preferably, the free cross-section E of the outlet end 19 is also smaller than the cross-section D of the deflection bend 18. The free cross-section D is again larger than the cross-section C. The ratio of the cross section C to the cross section A is preferably less than 0.7. As mentioned, the free cross section D is larger than the free cross section C. It is preferably larger by the amount which is formed by the height d of the backwater 22 (FIG. 2b). The cross section E of the outlet end 19 is preferably approximately the same as the free cross section C of the vertical region 17. The accumulation height H shown in FIG. 3, which is defined by the overflow section 28, is substantially larger than the diameter of the vertical pipe section 14. Preferably, the accumulation height H is 4 to 7 times larger than the inner diameter of the vertical area 14. The inside diameter of the drain bend 14 in the vertical area 17 is, for example, 50 mm. In the area of the bend 16, the inside diameter according to the cross section B is, for example, 100 mm. The diameter in the area of the cross section A is, for example, about 70 to 80 mm. Seen in the direction of flow, the free cross section after the connection piece 12 is thus considerably narrower. In the area of the deflection curve 18 there is then an expansion and then a further narrowing.

The mode of operation of the invention is explained in more detail below with reference to FIGS. 3 to 9.

Figure 3 shows schematically the system 1 in the idle state. The odor trap 10 is filled with water 11. The level 24 of the water 11 is determined by the overflow edge 28. The water 11 seals the interior 34 of the bowl 8 from the outlet arch 14.

FIG. 4 shows the start of a winding process in which water flows into the interior 34 through the nozzles 9a in the direction of the arrows 23. The level 24 rises accordingly and a flow 27 forms in the outlet arch 14. As a result of the above-mentioned narrowing in the vertical region 17 of the outlet arch 14, more water now flows in this region than can be carried away. By directing the flow through the swamp, the flow is distributed in cross section E in such a way that an air entry in cross section E is prevented. A closed flow 27 ′ is formed comparatively quickly in the discharge arch 14, as shown in FIG. 5. The level 24 now rises approximately to the top 30 of the deflection curve 37, as FIG. 5 clearly shows. In the vertical closed Flow 27 'forms a vacuum due to the higher flow rate prevailing here. This causes the odor trap to be drained more quickly. As a result of this suction, the liquid 11 as well as parts and faults contained therein are entrained and transported into the discharge sheet 14 and the disposal line 21. The water level 24 drops correspondingly quickly and finally drops to the lower area of the odor trap 10, as shown in FIG. 6. 7 now flows through the odor trap 10 into the drain arch 14 and interrupts the closed flow 27 '. The suction effect is thus interrupted and the odor trap 10 can now be refilled with subsequent rinsing water until the initial state shown in FIG. 3 is reached again. After the winding valve has been closed, the winder box 2 is filled again with washing water and the system 1 is then ready for a further winder.

The winding action can be further increased if, according to FIG. 9, the run-off nozzles 9a run obliquely with respect to the bowl rim 8a. As a result, during the refilling and cleaning of the bowl, a swirl vortex 32 shown in FIG. 9 is formed, which extends from the edge 8a to the drain opening 31 and which causes the bowl 8 to be filled up more quickly and to a greater degree of rinsing and thus more intensive cleaning of the bowl 8. The vortex 32 thus supports the effect of the flow sheet 14 explained above.

FIGS. 10 to 12 show a drain bend 14 'which has an upper and essentially horizontal end 15', a region 17 ', a deflection bend 18' and a drain end 19 '. This drain bend 14 'is preferably provided for a floor connection close to the wall and perpendicular, as shown in FIG. 10. This drain arch 14 'requires little space between a building wall 35 and Rear side 36 of a toilet bowl 8. It is essential in this drain bend 14 'that the deflection bend 18', which is essential for a back pressure, lies with the vertical region 17 'in a plane which is essentially perpendicular to the longitudinal axis of the connecting piece 12. The drain end 19 ', which here extends vertically downward, preferably also runs in this plane. The region 17 which runs vertically in the discharge arch 14 is an obliquely extending region 17 'in this variant. The diameter C of this area 17 'is also substantially smaller than the diameter B' of the connecting bend 16 '. Since the drain arch 14 'takes up little space in depth, the toilet bowl 8 can be mounted particularly close to the building wall 35, which is a significant advantage, particularly in small rooms. It is also advantageous that the drain bend 14 'can be produced in one piece and an intermediate piece 20 is not required. The drain arch 14 'thus enables particularly simple assembly.

The discharge arch 14 ″ shown in FIGS. 13 to 16 is preferably also a blow molded part made of plastic and is fastened to the rear wall 8a of the bowl 8 at an upper edge 41. At a lower, vertically running end 19 ″, the drain bend 14 ″ is connected to the disposal line 21 by means of a rubber seal 40.

A deflection bend 43, the shape of which can be seen in FIG. 16, is arranged after the edge 41 in the flow direction. The deflection bend 43 forms a receiving space 45 for the water flowing through the nozzle 12 into the outlet bend 14 ″. Below the deflection bend 43 there is a constriction 44 which reduces the free inner cross section B "to the smaller inner cross section C". Between the constriction 44 and the lower end 19 ″, the outlet arch 14 ″ is bent in an S shape in a plane running parallel to the rear side 8a. An upper arch Si of this S-shaped area has a plurality of inwardly directed ribs 46 to 51 and forms an angle which is preferably greater than 90 °. An upper rib 46 forms the upper end of the sheet Si and a lower rib 51 forms the lower end of the sheet Si. Between the two completely circumferential ribs 46 to 51 there are further completely circumferential ribs 47 and 49 and only partially circumferential ribs 48 and 50. Another rib 52 is arranged directly at the upper end of the outlet end 19 ″. The exact course of the S-shaped area and the arrangement of the ribs 46 to 52 can be seen in FIGS. 13 to 15. The functioning of the flow sheet 14 ″ is explained below.

During rinsing, the rinsing water passes through the connection piece 12 into the deflection bend 43, the swallowing capacity of the receiving space 45 being comparatively large. The rinse water now passes through the partial constriction 44 into the adjoining area which has the narrower cross section C '. This constriction forms a closed flow through which the rinsing water is effectively sucked off into line 21. The ribs 46 to 52 form further constrictions, which support and reinforce the formation of the closed flow and thus the suction effect. As explained above, it should be possible to rinse as little rinse water as possible. However, a minimum amount of rinsing water is required to form a closed flow. The ribs 46 to 52 make it possible to further reduce this required amount. The effect of the ribs 46 to 52 could essentially be seen in that they break the flow of the rinsing water and thus support the formation of a closed flow. It is also advantageous that such ribs 46 to 52 are comparatively simple in the blow molding process. are adjustable. Since, as explained, the curves of the drain bend 14 ″ run in a plane parallel to the rear 8a, the space requirement is comparatively small. Finally, the assembly of the drain elbow 14 '' is very simple.

Claims

claims 1. Water-saving toilet system, with an odor trap (10) having a basin (8) and a flushing device (2) with which the basin (8) can be flushed and with an outlet (14), which is seen in the flow direction after the odor trap (10 ) is to be connected to a disposal line (21) and through which rinsing water and parts of the disposal line (21) which are also transported during rinsing can be supplied, characterized in that the outlet (14) has an essentially vertical region (17) which has a smaller free cross section (C) has, as a further area (A) of the outlet (14) arranged above this area, such that during rinsing, said vertical area (17) flows more water than away from it and a closed water flow (27 ') forms, which sucks the odor trap (10) essentially empty. 2. Plant according to claim 1, characterized in that the drain is essentially formed by a drain bend (14) and this below the vertical region (17) has a deflection bend (18) which has a free cross section (D) which is larger than the free cross section (C) of said vertical region (17). 3. Installation according to claim 1 or 2, characterized in that the ratio of the free cross-section (C) of the vertical region (17) to the free hydraulic cross-section (A) of the drain connector (12) is substantially equal to or less than 0, 8th. 4. System according to claim 2 or 3, characterized in that the deflection bend (18) is designed such that after rinsing, a so-called sump (22) forms and the free cross-section (D) of the deflection bend (18) is larger than the free cross-section (C) of the vertical region mentioned. 5. Installation according to one of claims 2 to 4, characterized in that seen in the direction of flow after the deflection bend (18) a drain end (19) is arranged, which has a free cross section (E), which is essentially the free cross section (C) of said vertical area (17). 6. Plant according to one of claims 1 to 5, characterized in that the accumulation height (H) is several times larger than the diameter in the vertical region (17). 7. Plant according to claim 6, characterized in that the ratio is in the range 4: 1 to 7: 1. 8. Plant according to one of claims 1 to 7, characterized in that the drain bend (14) is a plastic tube 9. drain elbow for a toilet system according to claim 1, characterized in that it is manufactured separately and can be placed on the nozzle (12) of the toilet bowl (8). 10. drain elbow according to claim 7, characterized in that it is a shaped piece. 11. drain elbow according to claim 9 or 10, characterized in that it has at its lower end a deflection bend (18) which forms a sump and directs the flow so that it is distributed in cross section E so that an air inlet prevents cross section E. becomes. 12. drain elbow according to one of claims 8 to 11, characterized in that the deflection bend (18 ') extends in a plane which extends transversely to the longitudinal direction of the nozzle (12) of the toilet bowl (8). 13. drain elbow according to claim 12, characterized in that it has a perpendicular drain end (19 '). 14. Drain bend according to claim 12 or 13, characterized in that the deflection bend (18 ') and a connecting bend (16') is connected to an obliquely extending pipe region (17 '). 15. drain elbow according to claim 9, characterized in that the free cross-section (B '', C '') is tapered below a deflection bend (43). 16. Drainage arch according to claim 1 or 15, characterized in that an under region (Si, S ₂ ) is S-shaped. 17. Drainage bend according to claim 16, characterized in that the S-shaped region has two bends (Si, S), these bends (Si, S ₂ ) having different opening angles (α, β). 18. drain elbow according to claim 17, characterized in that the upper arch (Si) has an opening angle (00, which is greater than 90 °. 19. Drainage bend according to claim 17 or 18, characterized in that the lower bend (S ₂ ) has an opening angle (β) which is less than 90 °. 20. Drain elbow according to claim 1 or 15, characterized in that it has inwardly projecting ribs (46-52). 21. Drain elbow according to claim 20, characterized in that the ribs (46-52) are arranged in an S-shaped region (Si, S ₂ ). 22. Drain elbow according to one of claims 9 to 21, characterized in that a blow molded part is made of plastic.