WATER SAVING BATH CUP INSTALLATION DESCRIPTION OF THE INVENTION The invention relates to a water saving toilet bowl installation, with a bowl comprising an odorless siphon and an irrigation device with which the bowl can be irrigated, and with a drain that seen in the direction of flow is located after the toilet siphon and is connected to a drainage pipe, and through which are transported to the drainage pipe irrigation water and the parts it is transported when irrigating. Efforts to reduce water consumption by irrigating toilet facilities are already very old. Already in the year 1888 through the document US 380,854 a toilet bowl installation was proposed, which comprises a vacuum source with which in each irrigation a negative pressure is produced that will reinforce the suction process. Another vacuum bath cup is also proposed by US 5,487,193. In this, a flexible diaphragm separates a water chamber from a vacuum chamber. This diaphragm is suddenly moved by a spring during an irrigation process. By this irrigation water is driven on the one hand and on the other hand a negative pressure is produced in the drain. This should also in this case improve the irrigation effect in order to obtain a sufficient irrigation effect despite
- * - at- ^ to use less water. US-A-2, 055, 90 which represents the generic type under consideration comprises a drain elbow which after a narrower and vertical portion opens down at a horizontally extending L-shaped drain end. In order that a closed flow can be formed in the drain elbow, however, a lot of irrigation water is comparatively required. A water-saving irrigation device for a toilet bowl is proposed by DE 298 07 813 Ul. In order to effectively irrigate a toilet with comparatively little irrigation water, a nozzle is disposed at the bottom of the odor trap, through which, during an irrigation process, a part of the irrigation water is injected diagonally to the spill. The nozzle is located at a forward end of a slope of a branch, so that a negative pressure is produced in the drain when a curved branch tube is completely filled. A tensile force of the downstream water stream must be reinforced by the nozzle. Vacuum bath cups suffer from the disadvantage that it is necessary to install a vacuum source, which is comparatively complex and requires additional space. In addition, it is almost impossible to avoid noise during vacuum operation. In the case of installations of toilet bowls with a nozzle in the odorous siphon, corresponding ducts are required towards that nozzle. This nozzle considerably increases the production of the cup. In addition, the nozzle can be covered, which causes faults. The object of the invention is therefore to create a toilet bowl installation in which the consumption of irrigation water is further reduced and which, however, is effective and reliable and can be manufactured economically. The task in the case of a toilet bowl installation of the type under consideration according to claim 1 is solved by the fact that the drain comprises a substantially vertical portion having a free cross section smaller than a portion of the drain which is located above this portion, so that with an irrigation more water flows to the vertical portion of the one that flows out of it, forming a closed flow of water, which substantially emptys by suction to the odorless siphon. In the installation of a water saving toilet bowl, neither a vacuum source nor a nozzle in the toilet siphon is required. The essential features of the invention relate to drainage. According to an improvement This can be formed by a drain elbow which has the mentioned vertical portion with the comparatively small free cross section and which can be substantially mounted to any conventional toilet bowl. It is therefore considered that an essential advantage of the invention is that a drain elbow of this kind can be mounted in existing toilet bowls and therefore it is possible to reduce water consumption very economically. The drain elbow can be made of plastic as a molded part and allows very diverse assembly situations. In particular, it is possible to drain the floor or connect it to the wall. In the case of the drain to the floor the drain conduit leads through the floor of the building and in the case of the connection to the wall, through the wall of the building. Experiments have shown that efficient irrigation is possible with approximately 4.5 liters of irrigation water and even less. According to a further development of the invention, the drain comprises below the mentioned vertical portion a deflection curvature having a free cross section that is larger than the free cross section of the aforementioned vertical portion. The invention also relates to a drain elbow for a water saving toilet bowl installation. This is preferably a molded part which, for connection to a tube of a toilet bowl, extends horizontally at its upper end. By this end it is possible to connect the drain elbow to the cup tube. A horizontal extending portion is also preferably provided at the lower end of the drain elbow. In the horizontal portion there is a curvature of deviation in which what is known as a puddle after an irrigation is formed. The free cross section of the deflection bend is greater than the free cross section of the vertical portion. In 10 the lower horizontal portion the drain elbow is connected to the drainage pipe. As already mentioned, this can be conducted vertically through the floor of the building or horizontally through the wall of the building. Other favorable characteristics are derived from the dependent claims, from the following description and from the drawings. An exemplary embodiment of the invention is explained in more detail below on the basis of the drawings. They show: Figure 1 schematically a vertical section through the toilet bowl installation according to the invention, Figure 2a schematically a view of the dorsal face of the toilet bowl installation according to Figure 1,
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Fig. 2b a section through the bottom of a drain elbow, Figs. 3 to 9 schematically individual phases of the irrigation process, Fig. 10 schematically a partial section of a toilet bowl installation with a drain elbow. according to a variant, figure 11 a view of the drain elbow according to figure 10, 10 figure 12 another view in partial section of the elbow according to figure 11, figure 13 schematically a view of the back part of a toilet bowl installation according to another variant, figure 14 a plan view on the installation according to figure 13, figure 15 a partial section through the drain elbow of the installation according to the figure 14, and figure 16 shows a section through the upper end of the drain elbow according to figure 15. The toilet bowl installation 1 contains a box with a cup 8 which is manufactured, by jemplo, ceramic or plastic. The cup 8 is fixed, for example, to
25 a support frame 6 having two sleepers 6b at the
- - * - - f - f - t rt iir 1 i 'fr. ^ _ ^^^ _ ^ M ^ M ^ riMMt) til | iM | which cup 8 is fixed, for example by screwing it in. Frame 6 has the lower end of legs 6a that are erected on a floor 7 of the building and are fixed to it As shown in Figure 1, the support frame 6 is disposed at a distance from a wall 33 of the building. of the building and the support frame 6 is a drain elbow 14, which at its lower end 19 is connected through a connection piece 20 to a drain pipe 21. However, a connection to the wall is also possible. which is not shown here, in which a connecting piece 20 correspondingly connects the lower end 19 with the drainage pipe in the building wall 33. To irrigate the toilet bowl 8 an irrigation box 2 is provided which in Figure 1 is only shown schematically, which to activate the irrigation comprises at least one button 3 and that after the irrigation process it is refilled through a supply pipe 4. However, the irrigation box 2 can also be replaced by a pressure pipe or other irrigation device. Irrigation water flowing out of the irrigation box 2 comes through a discharge elbow 5 to an irrigation channel 9 at the upper edge of the cup 8, and finally through nozzles 9a to the interior space
.hiÉ ^ i? cup-shaped cup 8. An irrigation process basically comprises the washing of the cup 8, the transport of elimination of the defecations as well as a refilling of the odorless siphon 10. Later on the individual stages of the irrigation process will be addressed. A cylindrical tube 12 is formed on the rear wall 8a of the cup 8, which has a free cross-section A and which, seen in the direction of flow, is disposed after the odorless siphon 8. A preferably circular opening 12a of the tube 12 leads to the drain elbow 14, which is connected to tube 12 with an upper end 15 of substantially horizontal extension. A gasket 13 of rubber elastic seal seals the tube 12 with respect to the drain elbow 14. The end 15 leads through a turn 16 to a vertical portion 17 having a free cross section C and which, as can be seen, is arranged behind the frame 6 of the support. As can be seen, the vertical portion 17 is substantially longer than wide and leads at the lower end to a deflection curvature 18 which after an ascending portion 18a is connected to a horizontal end 19 of the drain. The deflection bend 18 is preferably formed by a curved piece 25 shaped to the vertical portion 17 as well as to the end 19 of the drain. Accordingly, the drain elbow 14 forms a unit with the deflection curvature 18 and the end 19 of the drain. The drain elbow 14 preferably consists of synthetic material, although, fundamentally, other material is also conceivable., for example, metal. The end 19 of the drain comprises a circular opening 19a through which the elbow 14 connects with the connecting piece 20. Particularly important in the drainage are the free and hydraulic cross sections A and C respectively. The free cross section C is substantially smaller than the free cross section A of the tube 12. In addition preferably the free cross section E of the end 19 of the drain is smaller than the cross section D of the deflection curvature 18. The free cross section D in turn is larger than the cross section C. The proportion of the cross section C with respect to the cross section A is preferably less than 0.7. The free cross section D is, as already mentioned, larger than the free cross section C. Preferably it is larger by the measurement formed by the height d of the stagnant water 22
(figure 2b). The cross section E of the end 19 of the drain is preferably approximately the same size as the free cross section C of the portion 17
^^^^^^^^^ ggagfeg ^ vertical. The pool height H shown in Figure 3, which is defined by the overflow edge 28, is substantially larger than the diameter of the vertical tubular section 17. Preferably, the back-up height H is 4 to 7 times larger than the internal diameter of the vertical portion 17. The internal diameter of the elbow 14 of the drain in the vertical portion 17 is, for example, 50 mm. In the region of the bend 16 the internal diameter corresponding to the cross section B is, for example, 100 mm. The diameter in the region of the cross section A is, for example, 70 to 80 mm. Accordingly, viewed in the direction of flow, the free cross section becomes substantially narrower after the tube 12. In the region of the deflection curvature 18, a broadening is then produced again and then a narrowing again. In the following, the manner of operation of the invention will be explained in more detail on the basis of FIGS. 3 to 9. FIG. 3 shows schematically the installation 1 in the idle state. The odorless siphon 10 is filled with water 11. The overflow rim 28 determines the level 24 of water 11. The water 11 seals the interior 34 of the cup 8 in front of the drain elbow 14. Figure 4 shows the principle of an irrigation process by which water flows into the inner space 34 through the nozzles 9a in the direction of the arrows 23. The level 24 rises correspondingly and in the drain elbow 14 a water is formed. flow 27. Because of the aforementioned narrowing in the vertical portion 17 of the drain elbow 14, more water flows to this portion from which it can be evacuated. By conducting the current through the puddle, the current is distributed in such a way that in the cross section E an air intake is prevented by the cross section E. In the drain elbow 14 a flow 27 'is formed comparatively fast. it closed, as illustrated in figure 5. the level 24 now increases almost to the top 30 of the deflection 37, as clearly shown in figure 5. in the closed stream 27 'vertically negative pressure is formed under most flow rate that reigns here. This causes an emptying by accelerated suction of the odorless siphon. By means of this suction drainage the liquid 11 is carried along with the parts and droppings that it contains to be transported to the drain elbow 14 and to the drainage pipe 21. The water level 24 drops correspondingly rapidly and finally lowers to the lower region of the water. odor trap 10, as illustrated in figure 6. Now according to figure 7 air flows to the drain elbow 14 through the
_ ^ _ ^ ^^^^^^^^^^^^^^^^^^^^ _? ^^^^^^^^^^^^^^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^^^^^^^^^ g ^^ rf siphon 10 and interrupts the flow 27 'closed. With this the suction effect is interrupted and the odorless siphon 10 can now be filled again by the irrigation water that follows until the starting state shown in FIG. 3 is reached again. After closing the irrigation valve the Irrigation box 2 is refilled with irrigation water and then installation 1 is ready for another irrigation. The irrigation effect can be further increased if according to Figure 9 the inlet nozzles 9a extend obliquely with respect to the edge 8a of the cup. By this, when filling and washing the bowl an irrigating swirl 32 is formed which is shown in Figure 9,
15 which extends from the edge 8a to the drain opening 31 and which has the effect of faster a total filling of the cup 8 and a stronger irrigation and therefore a more intensive washing cup 8. The swirl 32 supports the effect in this way
20 explained of the drain elbow 14. Figures 10 to 12 show a drain elbow 14 'having an upper end 15' and extending substantially vertical, a portion 17 ', a deviation curvature 18' and a drain end 19 '. This elbow
14 'of drain is preferably provided for a
SftÉÉK¿i¿í-tt_ - '- • ^^ -' • '-M * connection to the floor near the wall and perpendicular to lead, as shown in figure 10. This elbow 14' of drainage requires of little space between a building wall 35 and the rear part 36 of a bathroom cup 8. The essential in the case of this drain elbow 14 'is that the curvature 18' of deviation essential for the reembal is found with the vertical portion 17 'in a plane extending substantially perpendicular to the longitudinal axis of the tube 12. In this plane preferably extends also the end 19 'of the drain, which here extends vertically downwards the portion 17 that extends vertically in the drain elbow 14 is a portion 17' which in this variant extends inclined. The diameter C of this portion 17 'is also substantially smaller than the diameter B' of the connection elbow 16 '. Since the drain elbow 14 'occupies little depth space it is possible to mount the toilet bowl 8 particularly close to the building wall 35, which is a substantial advantage in particular in the case of small rooms. It is also convenient that the drain elbow 1 'can be manufactured in one piece and a joining piece 20 is not required. The drain elbow 14 'allows a particularly simple assembly in this way. The drain elbow 14"illustrated in FIGS. 13 to 16 is preferably also a piece of blow molded plastic and is fixed to the rear wall 8a of the cup 8 at an upper edge 41. At a lower end 19"of vertical extension the drain elbow 14" is connected to the drainage pipe 21 by a rubber packing 40. Viewing in the direction of flow there is disposed after the edge 41 a deviation bend 43 whose conformation can be deduced from figure 16. The deviation elbow 43 forms a receiving space 45 for the water flowing through the pipe 12 to the interior of the elbow 1 '' of drainage. Below the bend bend 43 there is a constriction 44 which reduces the free internal cross section B '' to the smaller internal cross section C ''. Between the constriction 44 and the lower end 19"the drain elbow 14" is bent into an S shape in a plane extending parallel to the rear portion 8a. A curve If upper of this S-shaped portion has several ribs 46 to 51 facing inwardly and forming an angle α that is preferably greater than 90 °. An upper rib 46 forms the upper end of the curve Si and a rib 51 the lower end of the curve Si. Between both completely surrounding ribs 46 and 51 there are other completely surrounding ribs 47 and 49 as well as only partially surrounding ribs 48 and 50. A
"fc · ---" - "additional rib 52 is located directly at the upper end of the end 19" of the drain The exact development of the S-shaped portion as well as the location of the ribs 46 to 52 is detached In the following, the operation mode of the drain elbow 14"is explained." In an irrigation, the irrigation water arrives through the tube 12 to the diversion bend 43, the capacity of reception of the space The receiving water is comparatively large.The irrigation water now reaches through the partial constriction 44 to the subsequent portion having the narrowest cross-section C. By this narrowing a closed flow is formed by which the irrigation water is sucked effectively into the pipe 21. Ribs 46 to 52 form additional constrictions that support and reinforce the formation of a closed flow and consequently of the suction effect. As explained above, it should be possible to irrigate with the minimum possible irrigation water. However, for a closed stream to be formed, a minimum amount of irrigation water is required. The ribs 46 to 52 allow this required amount to be further reduced. The effect of the ribs 46 to 52 can also be considered in that they substantially break the flow of irrigation water
- ***. * »*» My and thereby support the formation of a closed current. It is further convenient that these ribs 46 a '-2 can be produced comparatively simply in the blow molding process. Since as explained, the curves of the drain elbow 14"extend in a plane parallel to the back part 8a, the space requirement is comparatively small. Finally, the assembly of the drain elbow 14"is also very simple.