EP1175534B1 - 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

The invention relates to a drain sheet for a water-saving toilet installation according to Preamble of claim 1.

Efforts to reduce water consumption when flushing toilet facilities to lower, are already very old. Already in 1888 was through US 380,854 proposed a toilet facility which is a vacuum source having, with which at each flushing a negative pressure is generated, which should reinforce the suction. Another vacuum toilet is also described by US 5,487,193 proposed. In this case, a flexible membrane separates a water chamber from a vacuum chamber. By means of a spring is at a flushing this membrane abruptly moves. On the one hand This will promote rinse water and on the other hand is in the process generates a negative pressure. This should also here the Rinse effect improve with the goal, with less rinse water nevertheless to achieve a sufficient rinsing effect. US-A-2,055,490 discloses a drainage arch with the mer- malenals of the preamble of claim 1, which is after a narrowed and vertical area below in a horizontally extending L-shaped outflow ends. So in the sequence sheet a closed Flow can be formed, however, is comparatively a lot of rinse water required.

A water-saving flushing device for a toilet is through DE 298 07 813 U1 proposed. To a toilet with comparatively to be able to rinse a small amount of rinse water effectively is Bottom of the odor trap a nozzle arranged through which during a rinse, a portion of the rinse water at an angle into the outlet is injected. The nozzle is located at a front End of a discharge slope, leaving a negative pressure in the drain is generated when a curved discharge pipe is filled. Through the nozzle should a downward pulling force of the watercourse be strengthened.

Vacuum toilets have the disadvantage that a vacuum source is installed must be, which is relatively expensive and additional Claimed space. In addition, there are noises in the vacuum actuation hard to avoid. For toilet facilities with a Nozzle in the odor trap are corresponding lines to this Nozzle required. This nozzle makes the production of the toilet bowl more expensive considerably. In addition, the nozzle can clog, resulting in Disruptions leads.

FR-A-1,148,893 discloses a toilet installation with a drain, which is bent several times.

The invention is based on the object of a water-saving To create toilet facility, which has the above-mentioned disadvantages avoids and still effective and reliable and cost-effective can be produced.

The task is in a flow sheet of the type mentioned solved according to claim 1. A particularly suitable Toilet system is the subject of claim 9.

The water-saving toilet system is neither a vacuum source another nozzle in the odor trap required. The Essential features of the invention relate to the process. This is essentially a flow sheet be formed, the said vertical Area with the comparatively small free cross-section owns and essentially to every common toilet bowl can be grown. A significant advantage The invention is thus seen in that such a flow sheet attached to existing toilet bowls and thus very cost-effective a reduction of water consumption possible is. The drain bend can be made of plastic as a fitting and allows very different installation situations. In particular, a floor drain or a wall connection possible. When draining the floor leads the drain line through the building floor and the wall connection through the building wall. Experiments have shown that efficient rinsing with about 4.5 liters of rinse water or even less possible is. According to a development of the invention, the Drain underneath said vertical area a deflection arc on, which has a free cross-section, the larger is as the free cross section of said vertical Range.

The invention thus relates to a drain sheet for a water-saving toilet facility. This is preferably a Shaped for connection to a nozzle of a toilet bowl runs horizontally at the upper end. At this end The drain bend can be attached to the neck of the bowl become. At the lower end of the discharge bend is preferably also provided a horizontally extending area. in the horizontal area is a deflection arc in which Forms a flush after a so-called swamp. Of the free cross section of the deflection arc is greater than the free one Cross section of the vertical area. At the bottom horizontal Area, the drain bend is connected to the disposal line. This can, as mentioned, vertically through the building floor or pass horizontally through a building wall.

Figur 1

schematisch einen vertikalen Schnitt durch eine Toilettenanlage,

Figur 2a

schematisch eine Ansicht der Rückseite der Toilettenanlage gemäss Figur 1,

Figur 2b

einen Schnitt durch den unteren Teil eines Ablaufbogens,

Figuren 3 bis 9

schematisch einzelne Schritte des Spülvorgangs,

Figur 10

schematisch im Teilschnitt eine Toilettenanlage mit einem Ablaufbogen,

Figur 11

eine Ansicht des Ablaufbogens gemäss Figur 10,

Figur 12

eine weitere, teilweise geschnittene Ansicht des Bogens gemäss Figur 11,

Figur 13

schematisch eine Ansicht der Rückseite einer Toilettenanlage gemäss einem Ausführungsbeispiel

Figur 14

eine Draufsicht auf die Anlage gemäss Figur 13,

Figur 15

ein Teilschnitt durch den Ablaufbogen der Anlage gemäss Figur 14 und

Figur 16

ein Schnitt durch das obere Ende des Ablaufbogens gemäss Figur 15.

Further advantageous features emerge from the dependent claims, the following description and the drawings.
An embodiment of the invention will be explained in more detail with reference to the drawings. In this case, Figures 1-12 do not show all the essential Merhmale of the invention. Show it:

FIG. 1

schematically a vertical section through a toilet facility,

FIG. 2a

1 schematically shows a view of the rear side of the toilet installation according to FIG. 1,

FIG. 2b

a section through the lower part of a drain sheet,

FIGS. 3 to 9

schematically individual steps of the rinsing process,

FIG. 10

schematically in partial section a toilet system with a drain sheet,

FIG. 11

a view of the flow sheet according to Figure 10,

FIG. 12

a further, partially sectional view of the sheet according to Figure 11,

FIG. 13

schematically a view of the back of a toilet installation according to an embodiment

FIG. 14

a plan view of the system according to Figure 13,

FIG. 15

a partial section through the flow sheet of the system according to Figure 14 and

FIG. 16

a section through the upper end of the flow sheet according to Figure 15.

The toilet unit 1 contains a toilet with a bowl 8, for example, made of ceramic or plastic is. Attached is the bowl 8, for example a support frame 6, which has two trusses 6b, where attached to the bowl 8, for example, is screwed.

The frame 6 has at the bottom of feet 6 a, which on a Building floor 7 are and are attached to this. As 1 shows, the support frame 6 is at a distance to a Building wall 33 arranged. In the space between the building wall 33 and the support frame 6 is a discharge bend 14, at its lower end 19 via an intermediate piece 20 is connected to a disposal line 21. However, it is also possible a wall connection, not shown here, in which a correspondingly shaped intermediate piece 20, the lower end 19 with a disposal line in the building wall 33 connects.

For rinsing the toilet bowl 8 is a in Figure 1 only shown schematically cistern 2 is provided to the Rinse operation has at least one key 3 and after the rinsing process via a supply line 4 again filled becomes. However, the cistern 2 can also by a pressure line or another flushing device to be replaced.

The flushing water flowing out of the cistern 2 passes over a drain sheet 5 in a flushing channel 9 at the top of the Bowl 8 and via nozzles 9a finally in the basin-shaped Interior 34 of the bowl 8. A rinsing process includes basically the cleaning of the bowl 8, the removal the feces and refilling an odor trap 10. On the individual steps of the flushing process is detailed below.

On the rear wall 8a of the bowl 8 is a cylindrical neck 12 integrally formed, which has a free cross-section A and seen in the flow direction after the odor trap. 8 is arranged. A preferably circular opening 12a of the Stutzens 12 leads into the flow sheet 14, with an upper, substantially horizontally extending end 15 to the Nozzle 12 is connected. A rubber-elastic gasket 13 seals the nozzle 12 against the drain bend 14 off. The end 15 leads via a bend 16 in a vertical region 17, which has a free cross-section C. and, as can be seen, arranged behind the support frame 6 is. As can be seen, the vertical area 17 is essential longer than wide and leads to a lower end Deflection arc 18, which after a rising portion 18 a on a horizontal outflow end 19 is connected. The deflector 18 is preferably formed by a bend 25, which at the vertical portion 17 and the outlet end 19 is formed. The drain sheet 14 thus forms with the deflection arc 18 and the expiry end 19 a unit. The flow sheet 14 is preferably made of plastic, in principle is however also another material, for example metal, conceivable.

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

The process now includes the free or hydraulic cross sections A and C are of particular importance. The free cross section C is much smaller than the free cross-section A of the neck 12. Preferably, moreover, the free cross-section E of the discharge end 19 is smaller than the cross section D of the deflection arc 18. The free cross-section D is again larger as the cross section C. The ratio of the cross section C to Cross-section A is preferably less than 0.7. The free one Cross-section D is, as mentioned, larger than the free cross-section C. He is preferably larger by the measure, which is formed by the height d of the backwater 22 (Figure 2b). The cross-section E of the discharge end 19 is preferably about same as the free section C of the vertical section 17. The stowage height H shown in Figure 3, which by the Overflow edge 28 is defined, is much larger than the diameter of the vertical pipe section 14. Preferably the water level H is 4 to 7 times bigger than the inner one Diameter of vertical area 14. The inside diameter of the flow sheet 14 in the vertical region 17 is, for example 50 mm. In the region of the bend 16, the inner diameter according to the cross section B, for example 100 mm. The diameter in the region of the cross section A is for example, about 70 to 80 mm. Seen in the flow direction the free cross section after the nozzle 12 is thus essential close. In the region of the deflection 18 then takes place again an extension and then again a narrowing.

Hereinafter, the mode of action will be described with reference to FIGS. 3 to 9 explained in more detail.

FIG. 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 drain sheet 14 from.

FIG. 4 shows the beginning of a rinsing process in which through the nozzles 9a in the direction of the arrows 23 water in the Interior 34 flows. The level 24 rises accordingly and in flow sheet 14 forms a flow 27. As a result of above-mentioned constriction in the vertical portion 17 of the drainage arch 14 now flows in this area more water than led away can be. By steering the flow through the Swamp the flow is distributed in the cross section E, that an air inlet at the cross section E is prevented. in the Drain sheet 14 is formed comparatively quickly a closed Flow 27 ', as Figure 5 shows. The level 24 Now rises approximately to the top 30 of the deflection arc 37, as Figure 5 clearly shows. In the vertical closed Flow 27 'forms due to the prevailing higher here Flow velocity is a negative pressure. This causes an accelerated empty suction of the odor trap. By this aspiration, the liquid 11 and contained therein Parts and feces entrained and in the flow sheet 14th and the disposal line 21 transported. The water level 24 drops accordingly quickly and eventually sinks up in the lower part of the odor trap 10, like the Figure 6 shows. Now air flows according to Figure 7 through the odor trap 10 in the drain sheet 14 and interrupts the closed flow 27 '. The suction is interrupted and the odor trap 10 can now by following Rinse water are refilled until the in FIG 3 output state is reached again. The cistern 2 will come back after closing the purge valve Rinsing water filled and then the system 1 for a ready for further rinsing.

The rinsing effect can be further increased if according to Figure 9, the inlet nozzles 9a with respect to the bowl edge 8a run diagonally. This forms during refilling and Cleaning the bowl, a rinse roll 32 shown in Figure 9, which extends from the edge 8a to the drain opening 31 and the faster filling of the bowl 8 and a stronger rinsing and thus a more intensive cleaning of the Bowl 8 causes. The vortex 32 thus supports the above explained effect of the flow sheet 14.

FIGS. 10 to 12 show a drainage bend 14 ', which is a upper and substantially horizontally extending end 15 ', a region 17 ', a deflecting bend 18' and an outlet end 19 '. This drain sheet 14 'is preferably for a near-wall and vertical ground connection provided, such as this is shown in FIG. This drain sheet 14 'needed little space between a building wall 35 and the Back 36 of a toilet bowl 8. It is essential in this Drainage 14 'that is essential for a backwater Deflection arc 18 'with the vertical portion 17' in a plane which is substantially perpendicular to the longitudinal axis of the nozzle 12 runs. In this plane preferably also runs the drain end 19 ', which extends vertically down here. The area at the outlet bend 14 vertically extending 17 is an oblique region in this variant 17 '. The diameter C 'of this area 17' is also essential smaller than the diameter B 'of the connection bend 16 '. Since the drainage arch 14 'takes up little space in the depth, the toilet bowl 8 can be especially close to the building wall 35 are mounted, which is especially true for small spaces a significant advantage. It is also advantageous that the Drain sheet 14 'can be made in one piece and a Intermediate piece 20 is not required. The drain sheet 14 ' thus allows a particularly simple installation.

The drainage bend 14 "shown in FIGS. 13 to 16 is preferably a blow molding of plastic and is at an upper edge 41 on the rear wall 8 a of the bowl eighth attached. At a lower, vertical end 19 " is the flow sheet 14 '' by means of a rubber seal 40 at the disposal line 21 connected.

Seen in the flow direction after the edge 41 is a deflection arc 43 arranged, the shape of Figure 16 taken can be. The deflecting bend 43 forms a receiving space 45 for the flowing through the nozzle 12 in the flow sheet 14 "flowing Water. Below the bend 43 is located a constriction 44, which the free inner cross-section B "on the smaller inner cross section C " The constriction 44 and the lower end 19 "is the discharge bend 14 '' S-shaped in a parallel to the back 8a Plane bent.

An upper arch S _{1 of} this S-shaped area has a plurality of inwardly directed ribs 46 to 51 and forms an angle α, which is preferably greater than 90 °. An upper rib 46 forms the upper end of the sheet S ₁ and a lower rib 51 forms the lower end of the sheet S ₁ . Between the two completely circumferential ribs 46 to 51 are further completely circumferential ribs 47 and 49 and only partially circumferential ribs 48 and 50. Another rib 52 is disposed directly at the upper end of the discharge end 19 ''. The exact course of the S-shaped region as well as the arrangement of the ribs 46 to 52 can be seen in FIGS. 13 to 15. The operation of the sequence sheet 14 "will be explained below.

When flushing the rinse water passes through the nozzle 12th in the Umlenkbogen 43, wherein the absorption capacity of the receiving space 45 is comparatively large. The rinse water passes now through the partial narrowing 44 in the following Area that has the narrower cross-section C ''. Through this Narrowing forms a closed flow through which the rinse water is effectively sucked into the conduit 21. The ribs 46 to 52 form further constrictions, which the Formation of the closed flow and thus the suction effect support and reinforce. As explained above, should can be rinsed with as little rinse water. In order to however, a closed flow can be formed a minimum amount of flushing water required. The ribs 46 bis 52 make it possible to further reduce this required amount. The effect of ribs 46 to 52 is likely to be significant also be seen in that they are the flow of rinse water break and thus the formation of a closed flow support. It is also advantageous that such ribs 46 to 52 in the blow molding relatively easy to produce are. As explained the curves of the drain bend 14 "in a plane parallel to the rear side 8a, the space requirement is comparatively small. After all Also the assembly of the drain bend 14 "is very easy.

Claims (21)

1. Outlet pipe for a toilet system, with a toilet bowl (8), containing a trap (10), and with a flush device with which the toilet bowl (8) can be rinsed, wherein the outlet pipe (14), which, behind the trap as seen in direction of the flow, is to be connected to a waste pipe (21) and through which, during the flushing, rinse water and the items contained therein are transported to the waste pipe (21), the curved outlet pipe (14) containing a substantially vertical section (17) that has a smaller available cross section (C) than the upper section of the curved outlet pipe (A), such that, during the flushing operation, significantly more water enters the afore-mentioned vertical section (17) than can drain off, resulting in the formation of a closed flow (27') and accompanying suction which essentially empties the trap (10) characterized in that the curved outlet pipe (14) includes, after the vertical section (17), an upper and a lower bend (S₁, S₂), forming an S-shape, wherein the outlet pipe (14) has inward ribs (46-52) which form additional contractions.
2. Outlet pipe in accordance with Claim 1, characterized by the fact that the curved outlet pipe (14) below the afore-mentioned vertical pipe section (17) has an available cross section (D) which is larger than the available cross section (C) of the vertical section (17).
3. Outlet pipe in accordance with Claim 1 or 2, characterized by the fact that the ratio of the available cross section (C) of the vertical pipe section (17) to the available hydraulic cross section (A) of the connecting piece (12) is basically equal to or lower than 0.8.
4. Outlet pipe in accordance with Claim 2 or 3, characterized by the fact that the outlet pipe (14) is formed in such a way that, after a flushing operation, water collects in the settling basin (22), and that the available cross section (D) of the outlet pipe behind the settling basin is larger than the available cross section (C) of the afore-mentioned vertical pipe section.
5. Outlet pipe in accordance with one of the Claims 2 through 4, characterized by the fact that the lower section of the curved outlet pipe (14) contains an outlet end (19) with an available cross section (E) that is approximately equal to the available cross section (C) of the afore-mentioned vertical pipe section (17).
6. Outlet pipe in accordance with one of the Claims 1 through 5, characterized by the fact that the lower section of the outlet pipe (14) forms a banking height (H) that is several times as large as the diameter of the vertical section (17).
7. Outlet pipe in accordance with Claim 6, characterized by the fact that this ratio lies between 4: 1 to 7: 1.
8. Outlet pipe in accordance with one of the Claims 1 through 7, characterized by the fact that the curved outlet pipe (14) is made of synthetic material.
9. Toilet system or toilet system with a toilet bowl (8), containing a trap (10), and with a flushing device with which the toilet bowl (8) can be rinsed and with an outlet pipe (14) according to Claim 1, wherein the outlet pipe (14) behind the trap (10) as seen in the direction of the flow is to be connected to a waste pipe (21) and through which, during the flushing, rinse water and the items contained therein are transported to the waste pipe (21), and wherein the outlet pipe is manufactured separately and can be attached to the connecting piece (12) of the toilet bowl (8).
10. Outlet pipe in accordance with Claim 7, characterized by the fact that the curved outlet pipe has been manufactured through moulding.
11. Toilet system in accordance with Claim 9 or outlet pipe in accordance with Claim 10, characterized by the fact that the curved outlet pipe forms a settling basin (22) at its lower end and directs the current in such a way that it is distributed over the cross section (E) and prevents air from entering.
12. Outlet pipe in accordance with one of the Claims 8, 10 or 11 or toilet system in accordance with Claim 9, characterized by the fact that the two bends (S₁, S₂) are positioned in a level that is perpendicular to the longitudinal axis of the connecting piece (12) of the toilet bowl (8).
13. Outlet pipe in accordance with Claim 12, characterized by the fact that the curved outlet pipe has a perpendicular outlet end (19').
14. Outlet pipe in accordance with Claim 12 or 13, characterized by the fact that the upper bend (S₁) and a connecting bend (16') are connected to a diagonal pipe section (17').
15. Toilet system in accordance with Claim 9, characterized by the fact that the available cross section (B", C") narrows below a diversion pipe (43).
16. Outlet pipe in accordance with Claim 1, characterized by the fact that, to the lower bend (S₂), a perpendicular outlet end (19') is attached, which is open at the bottom.
17. Outlet pipe in accordance with Claim 16, characterized by the fact that the two bends (S₁, S₂) have different aperture angles (α, β)
18. Outlet pipe in accordance with Claim 17, characterized by the fact that the aperture angle (α) of the upper bend (S₁) is greater than 900.
19. Outlet pipe in accordance with Claim 17 or 18, characterized by the fact that the aperture angle (β) of the upper bend (S₂) is smaller than 90°.
20. Outlet pipe in accordance with Claim 19, characterized by the fact that the ribs (46 - 52) are arranged in the area of the two bends (S₁, S₂).
21. Toilet system in accordance with Claim 9 or 10 or outlet pipe in accordance with one of the Claims 10 to 20, characterized by the fact, that the outlet pipe has been manufactured through blow moulding from synthetic material.

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