ES2689775T3 - Inlet valve for a cistern - Google Patents

Abstract

Inlet valve (1) for filling a cistern, comprising a housing (2), a water conduit channel (3) disposed in the housing (2) with an inlet (4) and an outlet (5), and a float-controlled valve (6) disposed in the water conduit channel (3), which blocks the water conduit channel (3) or releases during filling, in which in the water conduit channel (3) a passage flow limitation element (7) is present, characterized in that the step flow limitation element (7) limits the flow rate of the water as the water pressure rises, because the flow rate is kept constant of passage of the water through the limitation element of the flow of passage (7) when a predetermined water pressure (P1) is reached and / or exceeded, so that the limitation element of the flow of passage (1) comprises minus an elastic element (8), arranged in the water conduit channel (3), whose elastic element (8) s and deforms as the pressure rises and through the deformation the cross section of the water conduit channel (3) in the area of the passage flow limitation element (7) is reduced, so that the limitation element of the passage flow (7) further comprises a narrowing (9) that reduces the cross section of the water conduit channel (3), such that said elastic element (8), seen in the direction of the flow (F) of the water, is arranged in front and at a distance of the narrowing (9), so that the distance between the elastic element (8) and the narrowing (9) is reduced as the pressure rises, whereby the cross-section of the channel of water conduction (3) is reduced for the reduction of the flow of flow, whose narrowing is prepared through at least one hole (10) in a wall (11), which penetrates or crosses the water conduction channel (3 ), and so that a mandrel (13) extends out of the wall (11) and presents an appendix (12), so that the elastic element (8) is fixed on the mandrel (13) in the water conduit channel (3) such that the appendix (12) serves as a stop for the elastic element (8), so that the appendix (12) and, therefore, the elastic element (8) are at a distance from the wall (11) and the at least one hole (10).

Description

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DESCRIPTION

Inlet valve for a cistern '

Technical field

The present invention relates to an inlet valve for a cistern according to the preamble of claim 1.

State of the art

The inlet valves serve to fill tanks of sanitary ware, such as toilets or urinals. The filling must be carried out in this case in a relatively short period of time, so that the washing must be quickly reusable again. In addition, the formation of noise must be small, so that the user cannot acoustically perceive the filling.

From in WO 2008/051311 an inlet valve is known, which has an element for limiting the flow rate. To this end, a set of different elements for limiting the flow rate is conditioned, which can be selected according to the mounting situation, and an adaptation of the cross-section is not possible during operation.

The sanitary technician also knows, from documents US 2013/0199626 A1, US 3 409 050 and US 2 960 109 some elements for limiting the flow of flow for use in faucets or pipes. These flow-limiting elements in each case have an elastic element, which narrows the cross section of the flow rate depending on the water pressure and thus limits the flow rate as the water pressure rises. .

Representation of the invention

The invention has the task of indicating an inlet valve, which is as silent as possible during the circulation of wash water.

This task is solved with the object of claim 1. Accordingly, an inlet valve for filling a cistern comprises a housing, a water conduit channel disposed in the housing with an inlet and an outlet, and a controlled valve by float arranged in the water conduit channel, which blocks the water conduction channel or releases it during filling. In addition, a passage flow limiting element is present in the water conduit channel, which limits the flow of passage as the water pressure increases, so that the flow rate of the water is kept constant through of the flow rate limiting element when it is reached and / or when a predetermined pressure is exceeded. The inlet valve further comprises the flow flow limiting element, which correspondingly limits the flow of passage.

The passage flow limiting element is controlled by the water pressure. By limiting the flow rate at high pressures, the inlet valve can be operated more silently.

Preferably, the predetermined pressure is in the range of 3 to 7 bars, in particular 4 to 6 bars. The constant flow rate is preferably in the range of 0.1 to 0.2 liters per second. In this case, the passage flow limiting element reduces the cross section of the water conduit channel as the pressure rises. The flow-limiting element is preferably configured such that in the presence of a maximum pressure, a minimum cross section remains open. Consequently, the flow rate through the modification of the cross-section is limited in this way. Through the safety of a minimum opening, it is also achieved at high pressures that the flow-limiting element does not act as a fine filter.

The passage flow limiting element comprises at least one elastic element disposed in the water conduit channel, whose elastic element deforms as the pressure rises and through the deformation the cross section of the conduction channel of water in the area of the passage flow limiting element.

The passage flow limiting element comprises a narrowing that reduces the cross section of the water conduit channel, so that said elastic element, seen in the water flow direction, is arranged in front of and away from the narrowing. The distance between the elastic element and the narrowing is reduced as the pressure rises, thereby reducing the cross section of the water conduit channel for the reduction of the flow rate.

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The narrowing is carried out through at least one hole in a wall, which penetrates or passes through the water conduit channel. The wall may in this case be an integral component of the housing or it may be inserted into the water conduit channel.

In a particularly preferred way, the wall has support places or support ribs that project towards the elastic element. These support ribs provide a minimum distance between the wall and the elastic element, whereby said minimum cross section can be conditioned at high pressures.

Preferably, the elastic element is an elastic disk. The disk is deformable in this case in the direction of flow of water through water.

The elastic element, in particular said elastic disk, is disposed on a mandrel in the water conduit channel, whose mandrel extends from the wall. To this end, the disc or the elastic element has a corresponding hole. Preferably, the mandrel and, therefore, the hole are arranged in the center in the water conduit channel. The mandrel extends in this case out of the wall and has an appendix. The elastic element is coupled in this case on the mandrel until it stops in the appendix, so that the appendix thus defines exactly the distance between the elastic element and the wall. In this way, the assembly of the elastic element can be simplified.

Especially preferably, the elastic element is arranged in a support element inserted in the water conduit channel. The support element is in this case a part of the passage flow limiting element and can easily be used in the water conduit channel.

Preferably, the support element prepares said narrowing. In addition, the support element preferably comprises said wall and the hole.

Preferably, the elastic element has a Shore hardness greater than 50 Shore or greater than 60 Shore or greater than 70 Shore.

Preferably, the inlet valve comprises an outlet pipe, through which the wash water can be discharged to a cistern and conditions the exit of the water conduit channel, so that the flow flow limiting element, seen in the direction of circulation, it is in front of the outlet pipe.

Preferably, the water conduit channel comprises a nozzle with a nozzle channel, in which the passage flow limiting element is part of the nozzle or is in the immediate vicinity of the nozzle. Especially preferably, the flow-limiting element is arranged, seen in the flow direction, after the nozzle.

Preferably, the flow-limiting element is, seen in the flow direction, in front of the float-controlled valve.

Other embodiments are indicated in the dependent claims.

Brief description of the drawings

Embodiments of the invention are described below with the help of the drawings, which only serve for explanation and should not be construed in a limiting sense. In the drawings:

Figure 1 shows a sectional view through a filling valve with a flow-limiting element.

Figure 2 shows a detail view of Figure 1;

Figure 3 shows a schematic detail view of the step flow limitation element in the unloaded state.

Figure 4 shows a schematic detail view of the flow-limiting element in the loaded state; Y

Figure 5 shows the flow rate behavior of a conventional filling valve and the filling valve according to one of the previous figures.

Description of preferred embodiments

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A sectional representation of the inlet valve 1 for filling a tank is shown in Figure 1. The inlet valve 1 comprises a housing 2, a water conduit channel 3 which is disposed in the housing 2 with an inlet 4 and an outlet 5 as well as a float controlled valve 6 disposed in the flow channel.

water line 3, which blocks the water line 3 or releases it during filling.

Inlet 4 is connected to the water supply line not shown here and outlet 5 flows into the cistern. At outlet 5, an outlet tube 14 can be connected. The float-controlled valve 6 is coupled with a float. The valve 6 can be opened or closed by means of the float according to the level of water in the tank. When the tank is empty, the valve 6 is open and during the filling of the tank the valve 6 is closed.

In addition, a passage flow limitation element 7 is arranged in the water conduit channel 3. With the step flow limitation element 7, the flow rate within the flow channel can be controlled or limited.

water conduction 3. The step flow limiting element 7 limits the flow rate in the flow channel

water conduction 3, such that when the predetermined water pressure is reached and / or exceeded, the flow rate through the flow flow limiting element 7 is maintained constant. Therefore, the flow rate It does not rise further despite the rise in water pressure. The flow limiting element 7 therefore has the function of limiting the flow when a predetermined water pressure is exceeded.

The function of the flow-limiting element 7 is shown in Figure 5. On the X-axis the pressure prevailing in the water conduit channel 3 is represented and on the Y-axis the flow rate is represented. The curve with the reference sign K1 shows a characteristic curve of the flow of inlet valves of the prior art. Curve K2 shows a characteristic flow flow curve in an inlet valve according to the invention. From curve 2 it can be recognized that when a predetermined pressure P1 is reached, the flow rate is kept constant. The constant flow rate level is indicated by the reference sign Q1. This in opposition to the inlet valves known from the state of the art, in which, as shown with the K1 curve, the flow of flow rises more in the same way as the pressure rises.

The predetermined pressure P1, from which the cause of passage remains constant, is preferably in the range of 3 to 7 bars, in particular 4 to 6 bars. The constant flow rate Q1 is preferably in the range of 0.1 to 0.2 liters per second. Especially preferred is a flow rate of 0.15 liters per second. Also with other values conceivable according to the configuration of the inlet valve.

Figures 3 and 4 show a scheme of principle of a step flow limitation element 7. The step flow limitation element 7 and the water conduit channel 3 are schematically represented in this case.

Figure 3 shows the flow limiting element 7 with a pressure P below the predetermined pressure P1. Pressure P is less than the predetermined pressure P1. The step flow limitation element 7 is in this case in its unchanged position in the water conduit channel 3. The amount of flow rate is not essentially influenced by the step flow limitation element 7.

Figure 4 shows the situation with a pressure P, which is greater than the predetermined pressure P1. Here it can be well recognized that the flow limiting element 7, seen in the flow direction, is pressed against a narrowing 9 of the water conduit channel 3. The relevant cross-section for the flow rate is reduced in this case before narrowing 9 through the flow rate limiting element 7, so that the flow rate is reduced in the same way. If the pressure P is now raised even more, then the flow-limiting element 7 is pressed further against the narrowing 9 and the cross-section is further reduced, which also correspondingly influences the flow rate.

Said in general terms, the flow flow limiting element 7 reduces the cross section of the water conduit channel 3 as the pressure rises, so that the amount of the flow rate is kept constant in the event that the predetermined pressure is exceeded.

The flow limiting element 7 is configured such that when a maximum pressure is reached, a minimum cross section remains open. The flow limiting element 7 therefore allows the passage of water for each pressure.

From Figures 1 to 4 it can be well recognized that the flow limiting element 7 has the form of an elastic element 8. The elastic element 8 is arranged in this case in the water conduit channel 3 and is deforms correspondingly through the elevation of water pressure. The deformation reduces the cross section of the water conduit channel 3 in the area of the flow limiting element 7.

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In connection with FIG. 2, it is also mentioned that the elastic element 8 is represented with a dotted and dashed line in the deformed state.

As shown in the figures, seen in the direction of the flow F, after the flow limiting element 7 there is a narrowing 9 that reduces the cross section of the water channel 3. The narrowing 9 can be part of the flow element limitation of the flow of passage 7. Said elastic element 8 is arranged in this case, seen in the direction of the water flow F, in front and at a distance of the narrowing 9. The distance between the elastic element 8 and the narrowing 9 is reduced as the pressure is raised, thereby reducing the cross section of the water conduit channel 3 for the reduction of the flow rate in this area. This narrowing can be well recognized in particular in Figures 2 to 4. Figure 2 also shows the reduction of the cross section in the area of the elastic element 8, which is shown in the deformed state with the dotted and dashed line. , and narrowing 9.

The narrowing 9 is conditioned by a hole 10 in a wall 11, which penetrates or crosses the water conduit channel. The narrowing 9 can in this case be in the form of a single hole or a plurality of holes in the corresponding wall. Preferably, the wall 11 is at right angles to the flow direction in the water conduit channel.

The wall 11 may have support places, which are oriented towards the elastic element 8. But these support places are not shown in the figures. These support places prevent the elastic element 8 from moving completely towards the wall 11 and completely closing the hole 10.

The elastic element 8 can be arranged in different ways in the water conduit channel. Figure 2 shows that the elastic element 8 is arranged on a mandrel 13. The mandrel 14 extends here from the wall 11. The mandrel 13 has an appendix 12, which serves as a stop for the elastic element 8. Appendix 12 and, therefore, also the elastic element 8 is located at a distance from the wall 11 and the hole 10. This also ensures that the elastic element 8 moves completely towards the wall 11 and completely closes the hole 10.

The elastic element 8 can also be arranged in a support element 17 inserted in the water conduit channel 3. The support element 17 is correspondingly shown in Figure 2. In this embodiment, in the support element 17 said mandrel 13 is provided. The support element 17 in this case conditions at the same time said narrowing 9 as well as said wall 11. The support element 11 can be inserted into the water conduit channel and is supported here on a wall 18 which is at right angles to the water conduit channel.

Especially preferably, the elastic element 8 has a Shore hardness greater than 59 Shore or greater than 60 Shore, in particular greater than 70 Shore. These Shore hardnesses have proved to be especially advantageous in trials.

In Figure 1 it can also be recognized that at outlet 5 an outlet pipe 14 is connected, through which the wash water can be discharged into a cistern. The outlet pipe 14 ends in this case with a corresponding outlet 19 in the tank. The flow limiting element 7, seen in the direction of circulation, is in front of the outlet pipe 14.

In the same way, in figure 1 it is shown that, seen from the inlet 4, the water conduit channel 3 comprises a nozzle 15 with a nozzle channel 16. The step flow limiting element 7 can be in this case part of the nozzle 15, as shown in the figures. Alternatively, the step flow limitation element 7 may also be in the vicinity, in particular in the immediate vicinity of the nozzle 15. In addition, in another embodiment, the step flow limitation element 7 may be , seen in the direction of the flow, at a distance from the nozzle 15.

But it is especially advantageous that the flow-limiting element 7 is, in the direction of the flow F, in front of the float-controlled valve 6. In this way, the float-controlled valve 6 is prevented from being loaded with large flow rates above Q1. This reduces noise during tank filling.

In summary, the flow flow limitation element has the advantage that the flow rate is automatically limited as the water pressure rises, which makes the inlet valve quieter.

List of reference signs

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Elastic element

Narrowing

Orifice

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Nozzle Outlet Tube

Nozzle channel Support element Wall Outlet

Claims (10)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 1. - Inlet valve (1) for filling a cistern, comprising a housing (2), a water conduit channel (3) disposed in the housing (2) with an inlet (4) and an outlet (5) , and a float-controlled valve (6) disposed in the water conduit channel (3), which blocks the water conduit channel (3) or releases during filling, in which in the water conduit channel (3) a passage flow limitation element (7) is present, characterized in that the step flow limitation element (7) limits the flow rate of the water as the water pressure rises, because it is maintained the flow rate of the water through the flow flow limiting element (7) is constant when a predetermined water pressure (P1) is reached and / or exceeded, so that the flow flow limiting element (1 ) comprises at least one elastic element (8), arranged in the water conduit channel (3), whose elastic element (8) deforms as the pressure rises and through the deformation the cross section of the water conduit channel (3) in the area of the flow-limiting element (7) is reduced, so that the step flow limiting element (7) further comprises a narrowing (9) that reduces the cross section of the water conduit channel (3), such that said elastic element (8), seen in the direction of the flow (F) of the water, is arranged in front and at a distance of the narrowing (9), so that the distance between the elastic element (8) and the narrowing (9) is reduced as the pressure rises, whereby the section Transversal of the water conduit channel (3) is reduced for the reduction of the flow rate, whose narrowing is prepared through at least one hole (10) in a wall (11), which penetrates or crosses the conduction channel of water (3), and so that a mandrel (13) extends out of the wall (11) and presents an appendix (12), so that the elastic element (8) is fixed on the mandrel (13) in the water conduit channel (3) such that the appendix (12) serves as stop for the elastic element (8), so that the appendix (12) and, therefore, the elastic element (8) are at a distance from the wall (11) and the at least one hole (10). 2. - Inlet valve (1) according to claim 1, characterized in that the predetermined pressure (P1) is in the range of 3 to 7 bars, in particular 4 to 6 bars, and / or because the flow rate constant (Q1) is in the range of 0.1 to 0.2 liters per second. 3. - Inlet valve (1) according to claim 1 or 2, characterized in that the passage flow limiting element (7) reduces the cross section of the water conduit channel (3) as the pressure, in which the flow-limiting element (7) is preferably configured such that in the presence of a maximum pressure, a minimum cross section remains open. 4. - Inlet valve (1) according to one of the preceding claims, characterized in that the wall (11) has support places that project towards the elastic element (8). 5. - Inlet valve (1) according to one of the preceding claims, characterized in that the elastic element (8) is an elastic disk. 6. - Inlet valve (1) according to one of the preceding claims, characterized in that the mandrel is arranged with the elastic element (8) in a support element (17) inserted in the water conduit channel (3) . 7. - Inlet valve (1) according to claim 6, characterized in that the support element (17) prepares said narrowing (9) and comprises said wall (11) and the orifice (10). 8. - Inlet valve (1) according to one of the preceding claims, characterized in that the elastic element (8) has a Shore hardness of more than 50 Shore or more than 60 Shore or more than 70 Shore. 9. - Inlet valve (1) according to one of the preceding claims, characterized in that the inlet valve (1) comprises an outlet tube (14), through which the wash water can be discharged to a cistern , so that the passage flow limiting element (7) is, in the direction of the circulation, in front of the outlet tube (14). 10. - Inlet valve (1) according to one of the preceding claims, characterized in that the water conduit channel (3), seen from the inlet, comprises a nozzle (15) with a nozzle channel (16), wherein the passage flow limitation element (7) is part of the nozzle (15) and / or is in the immediate proximity of the nozzle (15) and / or in which the passage flow limitation element (7), seen in the flow direction, is located after the nozzle (15) and / or because the flow-limiting element (7), seen in the flow direction, is in front of the valve ( 6) float controlled.