EP2700759A1 - Inlet fitting for a cistern - Google Patents

Abstract

The fitting (1) has a water channel (2) comprising an inlet (8) and an outlet (9) for supplying rinse water to a cistern. A pipe housing (6) is connected with a terminal housing (4) that forms a section (3) of the channel, where the pipe housing forms another section (7) of the channel. A control valve (10) is arranged in the channel. A back pressure element (11) is arranged in an area of the outlet and closed during beginning of filling of the channel, where the channel is opened during reaching of water pressure such that the water flows from the channel to the cistern.

Description

TECHNICAL AREA

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

STATE OF THE ART

Inlet fittings are used for filling cisterns of sanitary items, such as toilets or urinals. The filling should be done in a relatively short period of time, so that the flushing is quickly operational again. In addition, the noise should be small, so that the user can not perceive the filling acoustically.

From the EP 1 323 875 An inlet fitting has become known which is intended to minimize the noise when refilling the flushing cistern. For this purpose, a plurality of perforated discs arranged in the inlet pipe, which minimizes the noise. Through the discs of the cross section in the inlet pipe is greatly reduced. The discs thus provide a hydraulic resistance. Due to this resistance, the refilling of the cistern takes a comparatively large amount of time.

PRESENTATION OF THE INVENTION

Based on this prior art, the invention has for its object to provide an inlet fitting, which allows a low-noise filling of the cistern.

This object is achieved by the inlet fitting according to claim 1. Accordingly, the inlet fitting for the filling of a cistern comprises a water channel with an inlet and an outlet for supplying flushing water into the flushing cistern, a junction box providing the inlet and a first portion of the water channel, having a connection pipe for connection to a supply pipe, a pipe casing communicating with the junction box, which adjoins the first section and in the installed position along a vertical axis extending second portion of the water channel provides, the second portion terminates with the outlet, and arranged in the water channel control valve for controlling the inflow from a supply line. In the region of the outlet, a backflow element is arranged, which is closed or substantially closed at the beginning of the filling of the water channel, wherein the water flowing into the water channel is dammed in the water channel, and which back pressure element opens upon reaching a water pressure, so that the water from the Water channel flows into the cistern.

Due to the stagnation of the water with the backwater element escapes the air within the tube housing or the water channel from the same. Thus, the pipe housing or the water channel no longer acts as a sound box, whereby the noise can be reduced. In addition, at the beginning of the filling, so shortly after opening the control valve, no splashing noises.

Preferably, the diameter of the second vertically extending portion between the end of the first portion and the backwater member is substantially constant and is formed by the inside of the pipe casing. This means that there are no backflow forming elements in this area.

The backflow element preferably comprises a closure seat arranged in the region of the outlet and a closure member which can be moved relative to the closure seat. The closure member lies while the closure seat until the said water pressure is reached. When the water pressure is reached, the closing element is moved away from the closure seat by the applied water pressure.

Preferably, the backflow element comprises a restoring element, in particular a spring element, which acts on the backstop element, in particular on the closure element, provides a restoring force. The return element is brought back into the closed position by the return element. The return element is preferably arranged between the tube housing and the closure member, wherein the closure member is moved by the return element against the valve seat. Alternatively, the return element can also be arranged outside the water channel.

Preferably, the backflow element closes the outlet substantially completely, so that at the beginning of the filling no or substantially no water can pass through the backflow element. Alternatively, the backflow element allows leakage, whereby the cistern is slightly faster filling. In addition, then located in the water channel air can escape through the backwater. The leakage can be provided in various ways. For example, by a mechanical interruption of the closure member or by a correspondingly sized return element.

Particularly preferably, the closure seat is a valve seat and the closure member is a valve body movable to the valve seat. The valve body rests against the valve seat and is moved on reaching the water pressure of the same way. The valve seat and closure body are preferably in communication with the pipe housing and are mounted in the water channel. For this purpose, a bearing point extends into the pipe housing. At the bearing point and the return element can be arranged.

In another embodiment, the closure seat is formed by the end face of the tubular housing bounding the water channel and the closure member is a flap which can be pivoted to the front side. The closure flap rests against the front side and is moved away from it when the water pressure is reached

The closure flap is preferably mounted via a bearing point arranged outside the water channel. At this bearing also the reset element can also be arranged, which then acts on the flap.

Preferably, the control valve is arranged in the first section and is preferably controllable via a float with respect to the water level in the cistern. Preferably, the inlet fitting in the connection housing on a balancing valve for the compensation of a negative pressure in the supply line.

The balancing valve preferably comprises a vent opening, wherein the vent opening can be closed by the water itself or by a closing body which can be moved through the water when the water level rises in the water channel.

The balancing valve is preferably a closure body that can be moved by the water onto the ventilation opening, wherein the closure body is preferably part of a diaphragm valve.

Alternatively, the balance valve is an overflow tube having an inlet projecting into the second section and an outlet standing above the water surface, the outlet acting as a vent opening. The inlet can be closed here by the rising rinse water. The closing can further prevent the formation of noise.

Preferably, a further tube housing is arranged parallel to the tube housing, in which the overflow tube opens with the outlet. Thus, with increasing water level in the water channel, the water, when the backwater is still closed, flow over the overflow pipe and the other pipe housing in the cistern. When the backflow element is open, the water can flow into the flushing cistern via the further tube housing and the tube housing provided with the backflow element. As a result, a splashing or other noise can be prevented.

An arrangement comprises a cistern and an inlet fitting according to the above description. The inlet fitting is arranged in the cistern, wherein the tube housing in the mounting eye is substantially perpendicular to the water surface of the water located in the cistern. Next is the inlet fitting with a supply line in connection.

Further embodiments are given in the dependent claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1

eine perspektivische Ansicht einer Einlaufgarnitur nach einer ersten Ausführungsform der vorliegenden Erfindung;

Fig. 2

eine Seitenansicht der Einlaufgarnitur nach Fig. 1;

Fig. 3

eine Schnittansicht entlang der Schnittlinie A-A in Fig. 2 der Einlaufgarnitur nach Fig. 1;

Fig. 4

eine weitere Schnittansicht entlang der Schnittlinie B-B in Fig. 2 der Einlaufgarnitur nach Fig. 1;

Fig. 5

eine Schnittansicht entlang der Schnittlinie C-C in Fig. 4 der Einlaufgarnitur nach Fig. 1;

Fig. 6

eine Seitenansicht einer Einlaufgarnitur gemäss einer zweiten Ausführungsform;

Fig. 7

eine Schnittansicht entlang der Schnittlinie A-A in Fig. 6 der Einlaufgarnitur nach Fig. 6;

Fig. 8

eine Schnittansicht entlang der Schnittlinie B-B in Fig. 6 der Einlaufgarnitur nach Fig. 6;

Fig. 9

eine Perspektivansicht einer Einlaufgarnitur gemäss einer dritten Ausführungsform;

Fig. 10

eine Seitenansicht der Fig. 9;

Fig. 11

eine Schnittansicht entlang der Schnittlinie A-A in Fig. 10 der Einlaufgarnitur nach Fig. 9;

Fig. 12

eine Schnittansicht entlang der Schnittlinie B-B in Fig. 10 der Einlaufgarnitur nach Fig. 9; und

Fig. 13

eine Schnittansicht entlang der Schnittlinie C-C in Fig. 11 der Einlaufgarnitur nach Fig. 9;

Preferred embodiments of the invention will be described below with reference to the drawings, which are given by way of illustration only and are not to be interpreted as limiting. In the drawings show:

Fig. 1

a perspective view of an inlet fitting according to a first embodiment of the present invention;

Fig. 2

a side view of the inlet fitting after Fig. 1 ;

Fig. 3

a sectional view taken along the section line AA in Fig. 2 the inlet fitting after Fig. 1 ;

Fig. 4

a further sectional view along the section line BB in Fig. 2 the inlet fitting after Fig. 1 ;

Fig. 5

a sectional view taken along the section line CC in Fig. 4 the inlet fitting after Fig. 1 ;

Fig. 6

a side view of an inlet fitting according to a second embodiment;

Fig. 7

a sectional view taken along the section line AA in Fig. 6 the inlet fitting after Fig. 6 ;

Fig. 8

a sectional view taken along the section line BB in Fig. 6 the inlet fitting after Fig. 6 ;

Fig. 9

a perspective view of an inlet fitting according to a third embodiment;

Fig. 10

a side view of Fig. 9 ;

Fig. 11

a sectional view taken along the section line AA in Fig. 10 the inlet fitting after Fig. 9 ;

Fig. 12

a sectional view taken along the section line BB in Fig. 10 the inlet fitting after Fig. 9 ; and

Fig. 13

a sectional view taken along the section line CC in Fig. 11 the inlet fitting after Fig. 9 ;

DESCRIPTION OF PREFERRED EMBODIMENTS

In the FIGS. 1 to 5 is a first embodiment of an inventive Inlet fitting 1 shown. The inlet fitting 1 is used to fill a cistern with rinse water. The inlet fitting 1 is arranged in the installed state inside a cistern.

The inlet fitting 1 comprises a water channel 2 for supplying rinsing water into the cistern, a connection housing 4 which provides a first section 3 of the water channel 2, a pipe housing 6 communicating with the connection housing 4 and providing a second section 7 of the water channel arranged in the water channel 2 control valve 10 for controlling the inflow from a supply line. The water channel 2 is thus divided into two sections 3 and 7.

The connection housing 4 further has a connecting piece 5 for connection of the inlet fitting 1 to a supply line.

The connection housing 4 is integrally connected to the tube housing 6, wherein the tube housing 6 preferably extends at right angles to the connection housing 4. When installed, the tube housing is substantially vertical with respect to gravity.

In the FIGS. 1 and 2 an exemplary control unit 27 for controlling the control valve 10 is shown on the inlet fitting. This control unit 27 here comprises a float 28, which communicates with a rod 29 with the control valve 10 in connection. Once the water level has reached the lower edge 30 of the weight body, the buoyancy of the float 28 drops and it moves down, causing the rod 29 is moved and the control valve 10 opens. When filling then the buoyancy force acts on the float 28 so that it is moved back up and the control valve 10 closes again when it reaches the level. The control unit 27 may also be designed differently.

In the FIG. 3 , which shows a sectional view through the inlet fitting 1, the first gate 3 and the second section 7 of the water channel 2 can be well recognized. The first section 3 opens into the second section 7. These two sections provide the water channel 2.

When installed, the first section 3 extends substantially horizontally and the second section 7, which is perpendicular to the first section 3, extends vertically.

The first section 3 has an inlet 8, via which the rinse water enters the water channel 2. The second section 7 has an outlet 9, via which the rinse water leaves the water channel 2 again.

In the area of the outlet 9, a backflow element 11 is arranged. The backflow element 11 sets a resistance to the rinse water entering the cistern. Before filling the cistern, the water channel 2 is either completely empty or at least partially filled with rinse water. Now, if the filling is triggered, the control valve 10 opens and rinse water flows through the water channel 2. At the end of the water channel 2, the rinse water is jammed by the backwater 11, whereby the water channel 2 is substantially completely filled with water. The existing in the water channel 2, in particular in the second section 7 air is displaced from the water channel 2. The air leaves here the water channel 2, for example via the backwater element 11, which allows for this purpose, a certain leakage. The air can also be led away from the water channel 2 otherwise. There is thus no interaction between the water flowing through a water channel 2 and the air. Such interaction repeatedly result in loud noises during operation, because the tube housing 6 acts as a resonator. In addition, the rinse water is slowed down at the beginning of the filling by the backwater element, whereby the noise emissions, such as chattering noises, are significantly reduced.

Upon reaching a predetermined water pressure within the water channel 2, the backwater element 11 opens so that the water from the water channel 2 can flow into the cistern. Depending on the dimensioning of the backflow element 11, this opens upon reaching a static pressure through the water column in the water channel 2 or through the present in the connecting line water pressure of the pipe network, which acts on complete filling of the water channel 2.

The backflow element 11 comprises a closure seat 12 arranged in the region of the outlet 9 and a closure member 13 which can be moved relative to the closure seat 12 At rest, the closure member 13 abuts the closure seat 12 and is then moved away from the closure seat 12 upon reaching the above-described water pressure, so that a passage between the closure seat 12 and closure member 13 is provided. Through this passage, the rinse water can leave the water channel 2 in the cistern.

The backflow element 11 further has a restoring element, here in the form of a spring element 14, which provides a restoring force on the backflow element 11, in particular on the closure member 13. The restoring force acts against the present in the water channel 2 water pressure. About the dimensioning of the spring element 14 of the opening provided for the water pressure can be adjusted accordingly.

The spring element 14 is here at in the cross section of the tubular housing 6 projecting webs 17 and the closure member 13 at. The webs 17 are arranged in the direction of flow of the rinsing water below the closure member 13 and the spring element 14 presses the closure member against the direction of flow to the closure seat 12th

The backflow element 11 preferably closes the outlet 9 substantially completely. This means that when the closure member 13 rests against the closure seat 12, no water flows out of the water channel 2.

Alternatively, however, the backflow element can also close the inlet in such a way that a certain leakage is permitted. Here, 12 passages may be provided between the closure member 13 and the closure seat, which allows drainage of water. However, the leakage should not exceed a certain level, so that the flushing water channel 2 can still be filled completely before the actual opening of the closure member 13.

In the FIG. 3 a first embodiment of the backwater 11 is shown. Here, the closure seat 13 is a valve seat 15, which is integrally formed on the tube housing 6. The closure seat 13 is provided by a restriction 31. The closure member 13 is a valve body 15 movable valve body 16. The valve body 16 is along the central axis M of the water channel 2 movable. In addition, the valve body 16 is mounted in the water channel 2. In the present embodiment, the valve body 16 via webs 17, which protrude from the tube housing 6 in the water channel and a molded onto the webs 17 bearing 18 is mounted. The bearing 18 essentially forms a cylindrical receptacle for a valve body 16 integrally formed bearing axis 32. The valve body 16 is movable with the Lagerachs 32 with respect to the bearing 18 in and against the direction of flow of the rinse water. The bearing 18 also serves to receive the spring element 14, which is arranged in a receptacle 37. The receptacle 37 is here part of the bearing 18 and is connected via the webs 17 with the tube housing 6 in connection. The receptacle 37 is here an annular opening.

In the FIG. 3 can be further recognized that the backflow element 11 is arranged exclusively in the region of the outlet 9 and thus forms the conclusion of the water channel 2. Seen in the direction of flow in front of the outlet 9, the diameter of the water channel 2 in the region of the tubular housing 6 no further constrictions or the like. The diameter is defined by the pipe diameter.

Based on FIGS. 3 to 5 Now, the exemplary guidance of the water channel 2 will be described. From the connection piece 5 to the inlet 8 of the water channel 2 in the first section 3 is straight and then extends around the central axis M of the Rohgehäuses 6 to the tubular housing 6 around. With respect to the central axis M is then opposite the connecting piece 5, the control valve 10. In the FIG. 5 the control valve 10 is shown in the closed position. As soon as the control valve is opened, the valve stem 38 is moved to the left and the valve 10 is correspondingly open. The water then flows along the dashed line through the first section 3 into the second section 7. In the FIG. 5 For example, the mouth of the outlet of the control valve 10 in the second section 7 can be easily recognized. This mouth bears the reference numeral 26. After the mouth 26, the water is then guided into the second section 7.

The first embodiment of the inlet fitting 1 according to the FIG. 3 further comprises a balancing valve 21. The balancing valve 21 is arranged in the region of the first section 3. On the one hand, the compensating valve 21 has the function of causing a negative pressure in the supply line, that is to say a negative pressure, which acts on the inlet 8 the balancing valve 21 opens so that air can be sucked out of the cistern. The compensating valve 21 thus prevents rinse water from being removed backwards via the water channel 2 from the cistern. For this purpose, the compensation valve 21 is in the installed state on the water surface of the cistern at its full filling. On the other hand, the equalizing valve 21 also has the function of closing when the water channel 2 is being filled, as soon as the water rising in the water channel 2 acts on the equalizing valve 21.

The equalizing valve 21 comprises a vent opening 25. The vent opening 25 is closed at the water level 2 rising water level, ie in the cistern filling, by the water itself or by a movable body 30 by the closing body.

In the FIG. 4 such a closure body 33 is shown. This closure body 33 is pushed upwards by flushing water rising in the second section 7 and thus closes off the venting opening 25. When the flushing water flows out or no longer exists, the buoyancy on the closure body 33 drops away and the latter again falls into the flushing body FIG. 4 shown situation back. The vent opening 25 is then again free and then air can be sucked through this vent 55, if at the connecting line a possible Unterduck would be present.

The closure body 33 may, for example, be part of a diaphragm valve 22 which is arranged in the first section 2 or in the connection housing 4. The membrane of the diaphragm valve 22 ensures the provision.

In the FIGS. 6 to 8 a second embodiment of an inventive inlet fitting 1 is shown. Identical parts are provided with the same reference numerals.

Also, the second embodiment of the inlet fitting 1 essentially comprises a water channel 2 for supplying rinse water into the cistern, a connection housing 4, which provides a first portion 3 of the water channel 2, a pipe housing 6 communicating with the connection housing 4, which has a second portion 7 of the water channel provides and arranged in the water channel 2 control valve 2 for Control of the inflow from a supply line. The water channel 2 is thus divided into two sections.

The connection housing 4 further has a connection piece 5 for connection of the inlet fitting 1 to a supply line and communicates with the tube housing in one piece.

The backwater element 11 of the second embodiment comprises, as in the sectional view FIG. 7 also shows a closure seat 12 and a closure member 13 which rests on the closure seat 12. The closure seat 12 is formed here by the end face 19 of the water channel 2 limiting tubular housing 6. The closure member 13 is a flap 19 which can be pivoted to the front side 19.

The pivotable flap 20 is mounted on the outside of the tube 6 via a bearing 34. At this bearing 34 and a return element 14, here in the form of a leaf spring, is provided. About this spring element 14, the restoring force is provided on the closure flap 20.

Next will be in the FIG. 7 Also shown a further embodiment of the compensation valve 21. In this case, the compensation valve 21 is a variant which can be closed by the water itself. The flushing water thus acts as a closure element in the compensation valve 21. The compensation valve 21 comprises an overflow tube 23 which is arranged in the connection housing 4. The overflow tube 23 has an inlet 35 and an outlet 36. The inlet 35 opens into the water channel 2. As soon as the water in the water channel 2 rises due to the closed backflow element 11, the inlet 35 is closed by the rising water level. Depending on the dimensioning of the backflow element 11, the water level in the overflow pipe 23 may continue to increase, so that water can flow off via the outlet 36 into a pipe housing 24 arranged parallel to the pipe housing 6.

If there is now a negative pressure in the supply line, which acts on the first section 3, air is sucked through the outlet 36 of the overflow pipe in the cistern. The outlet 36 is analogous to the vent opening 25 above the water level arranged.

Preferably, the backflow element 11 is dimensioned such that the backflow element 11 opens before the water is supplied via the overflow 23 to the tubular housing 24.

The backwater element 11 according to the second embodiment can also be applied to the first embodiment according to FIGS FIGS. 1 to 6 to be ordered. Equally, the backflow element 11 of the first embodiment can then in the in FIG. 7 be arranged embodiment shown. An exchange of the two embodiments of the compensation valve is conceivable.

In the FIGS. 9 to 13 a third embodiment of the inlet fitting 1 is shown. Like parts are in turn provided with the same reference numerals.

Also, the third embodiment of the inlet fitting 1 essentially comprises a water channel 2 for supplying rinse water into the cistern, a connection housing 4, which provides a first section 3 of the water channel 2, a pipe housing 6 communicating with the connection housing 4, which has a second section 7 of the water channel and a arranged in the water channel 2 control valve 2 for controlling the inflow from a supply line. The water channel 2 is thus divided into two sections.

The connection housing 4 further has a connection piece 5 for connection of the inlet fitting 1 to a supply line and communicates with the tube housing in one piece.

The third embodiment is similar to the second embodiment, but has a backwater element 11 according to the first embodiment.

Furthermore, the third embodiment in turn comprises a further tubular housing 24, into which the overflow tube 23 of the compensation valve 21 opens. In contrast to the second embodiment, here the overflow pipe 23 is not integrated directly in the connection housing 2, but rather formed on the connection housing 2.

In other embodiments, it is also conceivable that the back pressure element 11 has the shape of a diaphragm which reduces the cross section in the region of the outlet 9, or that the back pressure element 11 is a slide.

LIST OF REFERENCE NUMBERS

1

inlet fitting

2

water channel

3

first section

4

connection housing

5

Anschlusssutzen

6

tube housing

7

second part

8th

inlet

9

outlet

10

control valve

11

Rückstaueelement

12

closure seat

13

closure member

14

spring element

15

valve seat

16

valve body

17

Stege

18

depository

19

front

20

flap

21

equalization valve

22

diaphragm valve

23

Overflow pipe

24

tube housing

25

vent

26

muzzle

27

control unit

28

swimmer

29

pole

30

lower edge

31

narrowing

32

bearing axle

33

closure body

34

depository

35

inlet

36

outlet

37

admission

38

tappet

Claims (15)

Includes inlet fitting (1) for filling a cistern
a water channel (2) having an inlet (8) and an outlet (9) for supplying rinse water into the cistern,
a connection housing (4), which provides the inlet (8) and a first section (3) of the water channel (2), with a connecting piece (5) for connection to a supply line,
a pipe housing (6) which is in communication with the connection housing (4) and which provides a second section (7) of the water channel (2) which adjoins the first section (3) and extends in an installed position along an axis (M) which is vertical , wherein the second section (3) ends with the outlet (9), and
a control valve (10) arranged in the water channel (2) for controlling the inflow from a supply line,
characterized in that
in the region of the outlet (9) a backwater element (11) is arranged, which at the beginning of the filling of the water channel (2) is closed, wherein the water in the channel (2) inflowing water in the water channel (2) is jammed, and which upon reaching a water pressure opens, so that the water from the water channel (2) flows out into the cistern. Inlet fitting according to claim 1, characterized in that the diameter of the second vertically extending portion (7) between the end of the first portion (2) and the backflow element (11) is substantially constant and formed by the inside of the tube housing (6) becomes. Inlet fitting according to claim 1 or 2, characterized in that the backflow element (11) in the region of the outlet (9) arranged closure seat (12) and a closure seat (12) movable closure member (13). Inlet fitting according to one of the preceding claims, characterized in that the backflow element (11) has a restoring element, in particular a spring element (14), which on the backflow element (11), in particular on the closure member (13), a restoring force against the flow direction of Rinse water provides. Inlet fitting according to one of the preceding claims, characterized in that the backflow element (11) closes the outlet (9) substantially completely, or that the backflow element (11) allows leakage. Inlet fitting according to one of the preceding claims, characterized in that the closure seat (13) is a valve seat (15) and that the closure member (13) is a valve body (15) movable valve body (16). Inlet fitting according to claim 6, characterized in that the valve body (16) along the central axis (M) of the water channel (2) is movable and is mounted in the water channel (2). Inlet fitting according to claim 7, characterized in that the valve body (16) in a via webs (17) connected to the tubular housing bearing (18) is mounted. Inlet fitting according to one of claims 1 to 5, characterized in that the closure seat (12) through the end face (19) of the water channel (2) limiting tubular housing (6) is formed, and that the closure member (13) to the end face (19 ) is pivotable closure flap (20), wherein the closure flap (20) is preferably mounted on a outside of the water channel (2) arranged bearing point (18). Inlet fitting according to one of the preceding claims, characterized in that the control valve (10) is preferably arranged in the first section (3) and is preferably controllable via a float with respect to the water level in the cistern. Inlet fitting according to one of the preceding claims, characterized in that the inlet fitting (1) in the connection housing (4) has a balancing valve (21) for the compensation of a negative pressure in the supply line. Inlet fitting according to claim 11, characterized in that the balancing valve (21) comprises a vent opening (25), the vent opening (25) rising in the water channel (2) water level by the water itself or by a movable body through the closure body (33) is lockable. Inlet fitting according to claim 11 or 12, characterized in that the balancing valve (21) is a by the water on the vent opening (25) movable closure body (33), wherein the closure body (33) is preferably part of a diaphragm valve (22). Inlet fitting according to claim 11, characterized in that the balancing valve (21) is an overflow pipe (23) with an inlet (35) projecting into the second section (7) and an outlet (36) standing above the water surface, the outlet (36 ) acts as a vent opening (25). Inlet fitting according to claim 14, characterized in that parallel to the tube housing (6) a further tube housing (24) is arranged, in which the overflow tube (23) opens with the outlet (36).

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