EP1896668A1 - Method and system for discharging a waste stream from a toilet and siphon installation for use therewith - Google Patents
Method and system for discharging a waste stream from a toilet and siphon installation for use therewithInfo
- Publication number
- EP1896668A1 EP1896668A1 EP06757807A EP06757807A EP1896668A1 EP 1896668 A1 EP1896668 A1 EP 1896668A1 EP 06757807 A EP06757807 A EP 06757807A EP 06757807 A EP06757807 A EP 06757807A EP 1896668 A1 EP1896668 A1 EP 1896668A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- toilet
- waste flow
- liquid
- discharge pipe
- siphon installation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/20—Siphon pipes or inverted siphons
Definitions
- the invention relates to a method for discharging a waste flow which consists of liquid and solid parts and comes from the flushing of a toilet, wherein the waste flow is accelerated at least once.
- a method for discharging a waste flow which consists of liquid and solid parts and comes from the flushing of a toilet, wherein the waste flow is accelerated at least once.
- a drawback of the known method is that the flow increaser must be given a relatively voluminous form in order to ensure a sufficient capacity, and thus a sufficiently- great acceleration of the waste flow, and to also prevent blockage by solid parts which do after all remain for some time in the flow increaser.
- a flow increaser is for instance marketed at the moment by applicant under the name "Gustavsberg' s Water Saving System", which is intended to be incorporated in a shared discharge pipe of a number of households.
- This known flow increaser is provided with a relatively narrow but high tank which is so large that it is only suitable for application in high-rise projects.
- a method of applicant is also known for discharging a waste flow which is described in WO 98/03743, and wherein use is made of a flow increaser with a relatively flat structure which is intended for installation in the crawl space of low-rise residential buildings. While this flow increaser is lower than the above described model, it is also wider so that a relatively large amount of space must also be left clear therefor. Furthermore, as a result of the low structure and the associated large surface area, special hydrodynamic measures are necessary in this flow increaser in order to ensure that an adequate siphoning action is still obtained when there is a small rise in the liquid level.
- both the known types of flow increaser have the drawback that their operation can be very adversely affected, particularly by fat residues which are for instance present in waste water- from bathrooms or kitchens. Such fat residues are deposited in the flow increaser when the waste flow is standing still therein and adhere strongly to all surfaces so that they are not readily flushed away. Such fat residues ultimately result in (partial) clogging of the flow increaser, whereby the flow speed in the whole discharge system can become insufficient to ensure a reliable transport, particularly of the solid parts, to the sewage system.
- the invention now has for its object to provide a method of the above described type, wherein the stated drawbacks do not occur.
- this is achieved in such a method in that the acceleration of the liquid takes place when it flows out of the toilet, or immediately thereafter.
- the flow increaser can also be embodied very compactly since it only has to deal with the waste flow from the toilet.
- the risk of clogging of the flow increaser is considerably reduced because fat residues are no longer carried therethrough.
- the waste flow is preferably accelerated by means of a siphoning operation, wherein the waste flow is collected and only accelerated after reaching a determined volume.
- Use can hereby be made for the acceleration of a simple system without moving parts which is operated by the waste flow itself. Furthermore, the effect of the acceleration is thus enhanced by accumulating the waste flow. This is particularly the case when the volume required for the acceleration is reached only after at least three successive flushes of the toilet.
- ULFT Ultra-Low Flush Toilet
- At least a part of the liquid Prior to acceleration at least a part of the liquid is preferably separated from the waste flow, and only this separated liquid is accelerated and fed back again to the waste flow.
- this flow increaser can be given a considerably more compact form.
- the response behaviour of the flow increaser is in this way improved because it will no longer be influenced by the presence of solid parts in the flow increaser, while the acceleration caused by the flow increaser moreover becomes reproducible.
- the method according to the invention can be performed in a small space when the waste flow is discharged, when it flows out of the toilet or immediately thereafter, first in a substantially vertical path and, after a bend, in a substantially horizontal path, the separation and acceleration take place in the substantially vertical part of the path and the accelerated liquid is fed back in the substantially horizontal part of the path.
- the separation can be performed most effectively during a vertical movement of the waste flow, while the horizontal feedback ensures that the total. height of the path where the separation takes place remains limited.
- the invention further relates to a system for discharging a waste flow which consists of liquid and solid parts and which comes from the flushing of a toilet adapted to perform the above described method.
- a discharge system which comprises at least one discharge pipe for the waste flow connecting to an outflow opening of the toilet and means connected to the discharge pipe for accelerating the waste flow
- the accelerating means are situated at the position of or close to the outflow opening of the toilet.
- the accelerating means herein preferably comprise a siphon installation which is adapted to collect the waste flow and which only becomes active for accelerating thereof once a determined volume has been reached.
- the volume at which the siphon installation becomes active can, as stated, advantageously amount to more than twice the flush volume of the toilet.
- the discharge system is provided with means placed between the discharge pipe and the siphon installation for separating out of the waste flow and feeding to the siphon installation at least a part of the liquid, and means connected to the siphon installation for feeding the accelerated liquid back again to the waste flow.
- the siphon installation is preferably provided with a feed opening connected to a standing part of the discharge pipe, and the separating means comprise an inflow edge at least partially bounding the feed opening and connecting smoothly onto a wall of the standing part of the discharge pipe. In this manner the liquid can be separated very easily, making use of the fact that the liquid will flow for the most part along the walls of the standing part of the discharge pipe, while the solid parts will usually drop downward through the middle of the pipe.
- the siphon installation can be arranged to the side of the standing part of the discharge pipe.
- the standing part of the discharge pipe and/or the siphon installation is formed integrally with the toilet.
- the toilet can thus be placed with a part of the discharge pipe and the siphon installation by a single fitter in one operation without further operations being necessary elsewhere in the discharge system. This saves time and cost and moreover reduces the chance of errors.
- the siphon installation is preferably given a relatively flat form and adapted to feed back the accelerated liquid to a lying part of the discharge pipe.
- the siphon installation can thus be built in under the toilet.
- the invention further relates to a siphon installation for use in a discharge system as described above, and a combination of a toilet and a standing part of a discharge pipe and/or siphon installation formed integrally therewith.
- Fig. 1 shows a section through a toilet with a part of a discharge system according to the invention connecting thereto
- Fig. 2 shows a section through a siphon installation applied in the discharge system of fig. 1, and
- Fig. 3 and 4 are views corresponding with fig. 2 of the siphon installation during different stages of uses.
- a toilet 1 comprises a toilet bowl 2, a cistern 4 connected thereto via a flush pipe 3 and a liquid trap 6 connecting to an outlet 5 of bowl 2.
- cistern 3 has a very small volume of for instance 2.5 litres, whereby toilet 1 can be characterized as an Ultra-Low Flush Toilet (ULFT) .
- Liquid trap 6 has an outflow opening 7 to which connects a system 8 for discharging a waste flow F coming from toilet 1.
- This waste flow F consists of liquid L and solid parts S.
- This discharge system 8 comprises a discharge pipe 9 with a standing part 10 and a lying part 11 (fig. 1).
- the flush volume of toilet 1 is so small that only- bowl 2 can be cleaned herewith and the thereby created waste flow F can be transported through liquid trap 6.
- Discharge system 8 is therefore provided with means 12 for accelerating waste flow F.
- accelerating means 12 are arranged according to the invention directly at the outflow opening 7 of liquid trap 6.
- accelerating means 12 comprise a siphon installation arranged round and adjacently of standing part 10 of discharge pipe 9.
- the siphon installation and the standing conduit part 10 can herein be formed integrally with toilet 1 or be mounted on toilet 1 prior to delivery, so that the fitting operations remain limited to placing of toilet 1 and connection thereof to the lying part 11 of discharge pipe 9.
- means 13 are arranged on the inflow side of the siphon installation for separating at least a part of the liquid L from waste flow F.
- These separating means 13 here comprise an inflow edge 15 fitting smoothly onto a wall 14 of the standing conduit part 10 and inclining radially outward, and a deflecting edge 16 which is located opposite inflow edge 15 and which inclines radially inward as seen in the dropping direction (fig. 2).
- These two edges 15, 16 bound an annular feed opening 17 of the siphon installation.
- the siphon installation itself comprises a tank 18 which is connected to feed opening 17 and provided with a siphon conduit 19 which debouches on the underside of tank 18.
- the volume of tank 18 is such that a number of flushes can be stored therein in order to enable a considerable quantity of flushing liquid to be introduced into the discharge pipe at one time.
- Tank 18 is for instance dimensioned such that 6 litres of flushing liquid are delivered, since many pipe systems are dimensioned for this quantity.
- Siphon conduit 19 is formed by a riser pipe 20 which is connected over a bend part 21 to a drop pipe 22.
- a pipe part 23 Arranged on the underside of drop pipe 22 is a pipe part 23 which is curved in a U-shape and which functions as a liquid seal, but which is dimensioned such that it is open in the rest position.
- This U-shaped pipe part 23 functioning as liquid seal debouches, as stated, on the underside of tank 18 into discharge pipe 9, this in the lying part 11 thereof. Because the feed side and the discharge side of the siphon installation communicate with each other via discharge pipe 9, no vent line is required therebetween as in conventional flow increasers.
- discharge system 8 The operation of discharge system 8 is now as follows.
- the waste flow F coming therefrom will reach discharge pipe 9 via outlet 5, liquid trap 6 and outflow opening 7.
- the waste flow F flows through the standing conduit part 10 to the lying conduit part 11.
- the liquid L In standing part 10 the liquid L here flows mainly along the pipe wall 14, while the solid parts S drop through the middle of pipe 9.
- the liquid L then follows the inflow edge 15 which connects smoothly onto pipe wall 14, and thus flows into tank 18 where in the first instance it is collected (fig. 3) .
- the solid parts S drop together with a small part of the liquid L further through the middle of pipe 9. Because there is thus only little liquid available for further transport of the solid parts S, these will accumulate at the beginning of the lying conduit part 11. With each flushing the liquid level increases further in tank 18 and in riser pipe 20 until it eventually reaches bend part 21.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sanitary Device For Flush Toilet (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1029345A NL1029345C2 (en) | 2005-06-27 | 2005-06-27 | Method and system for discharging a waste stream from a toilet and the siphon installation to be used. |
PCT/NL2006/000309 WO2007001168A1 (en) | 2005-06-27 | 2006-06-23 | Method and system for discharging a waste stream from a toilet and siphon installation for use therewith |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1896668A1 true EP1896668A1 (en) | 2008-03-12 |
EP1896668B1 EP1896668B1 (en) | 2012-04-25 |
Family
ID=36477324
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06757807A Active EP1896668B1 (en) | 2005-06-27 | 2006-06-23 | Method and system for discharging a waste stream from a toilet and siphon installation for use therewith |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1896668B1 (en) |
AT (1) | ATE555256T1 (en) |
NL (1) | NL1029345C2 (en) |
WO (1) | WO2007001168A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NZ569626A (en) * | 2006-01-12 | 2010-02-26 | Caroma Ind Ltd | Keeping sewer drainlines clear with low flush toilets or cisterns |
DE102016000041A1 (en) * | 2016-01-04 | 2017-07-06 | Deutsche Bahn Fernverkehr Ag | Sanitary installation for vehicles |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4242765A (en) * | 1979-08-17 | 1981-01-06 | Russell Joyce A | Water saving commode |
WO1998003743A1 (en) * | 1996-07-24 | 1998-01-29 | Wisa B.V. | Siphon device |
NL1009816C2 (en) * | 1998-08-06 | 2000-02-15 | Wisa Bv | Method and system for the removal of a waste stream and the siphon installation to be used therewith. |
-
2005
- 2005-06-27 NL NL1029345A patent/NL1029345C2/en not_active IP Right Cessation
-
2006
- 2006-06-23 EP EP06757807A patent/EP1896668B1/en active Active
- 2006-06-23 AT AT06757807T patent/ATE555256T1/en active
- 2006-06-23 WO PCT/NL2006/000309 patent/WO2007001168A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2007001168A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE555256T1 (en) | 2012-05-15 |
NL1029345C2 (en) | 2006-12-28 |
EP1896668B1 (en) | 2012-04-25 |
WO2007001168A1 (en) | 2007-01-04 |
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