EP3199715B1 - Overflow for a basin, in particular rinsing basin - Google Patents

Description

The invention relates to an overflow for a sink according to the preamble of claim 1, with at least one inlet opening which is intended for mounting on a basin of the sink or on an overflow trough or a separate spout, and with an outlet opening which is intended for mounting on a Drain or ventilation valve of the basin or the sink is determined, wherein a flow channel for a fluid or water is arranged between the inlet opening and outlet opening and at least one section is provided in the flow channel in which the flow channel has an essentially circular cross section.

The invention also relates to a sink with at least one overflow, which sink comprises an opening in a side wall of a sink or an opening in a horizontal surface of the sink, preferably in the area of an overflow trough or a separate spout, which opening is fluidically connected to the via an overflow Drain of the sink is connected, according to the preamble of claim 11.

Sinks of a known type, in particular kitchen sinks, regularly have an overflow, as defined above, so that when the actual sink outlet is closed, excess water can drain out of the sink or an overflow trough if the water level has reached a certain level or if water flows into the overflow trough or the spout, e.g. from a sink drainer. This is to avoid flooding and damage.

Such sinks or comparable trained sinks / bathtubs are from the EP 1 975 325 A2 , the US 2008/196161 A1 and the US 746 419 A known.

In the past, it has sometimes been difficult to ensure proper functioning of the overflow, which must be able to regularly dispense a relatively large amount of water of up to 12 l / min the sink sink. For this purpose, for example, complex and correspondingly costly vents have been provided for the overflow so that it can fulfill its safety function at any time without restrictions. Especially when draining overflow troughs or separate spouts, it has been shown that the back pressure required for proper functioning is difficult to achieve.

The invention has for its object to provide an improved overflow in a simple and inexpensive manner so that overflowing water can be optimally and safely drained from the basin and / or the overflow trough or the separate spout. Preferably, this solution should also be able to be implemented retrospectively (retrofittable) even in the case of already existing sinks and can be flexibly adapted to the geometry of the overflow or the sink.

The object is achieved by an overflow with the features of claim 1 and by a sink with the features of claim 11. Advantageous further developments of the respective subject matter of the invention are defined in the corresponding subclaims.

According to the invention is an overflow for a sink, preferably a kitchen sink with at least one sink and an overflow trough or a separate spout, with at least one inlet opening which is intended for mounting on the basin or on the overflow trough or the separate spout, and with an outlet opening , which is intended for mounting on a drain or ventilation valve of the sink or basin, wherein a flow channel for a fluid is arranged between the inlet opening and the outlet opening and wherein at least one section (flow channel section) is provided in the flow channel in which the flow channel has an essentially circular cross-section, characterized in that several such sections with a circular cross-section are arranged in parallel in the flow channel, the sections being arranged next to one another, in the manner of a triangle, offset or arranged in a zigzag, in each case based on the position of their center elpoints.

The overflow can, in particular, also have two or more inlet openings, one of which can be mounted or mounted on the basin and another on the overflow trough or the separate spout or another basin, if present. In addition, the implementation of several separate overflows according to the invention is possible, e.g. for every sink or for sink and overflow trough or spout.

According to another aspect of the invention, a sink according to the invention with at least one overflow, which sink comprises an opening in a side wall of a sink or an opening in a horizontal surface of the sink, preferably in the area of an overflow trough or a separate spout, which opening has a Fluid overflow is connected to an outlet of the sink, characterized in that the sink has an overflow according to the invention or a further development thereof.

According to the invention, it is therefore provided that in the flow channel defined between the at least one inlet opening and the outlet opening of the overflow, a plurality of sections arranged in parallel are provided, in which the flow channel has an essentially circular cross section, even if the flow channel itself - which is the rule - Has a different cross-sectional geometry. The flow channel sections with a circular cross-section provide for eddy formation when liquid runs through the overflow, similar to an inverted bottle when it is set in motion about its longitudinal axis. As a result, there is less jammed air in the system and fluid drainage through the overflow is improved. This has a particularly advantageous effect, particularly in the case of overflow troughs and separate spouts, because with this arrangement, a dynamic pressure cannot really build up.

In a further development of the overflow according to the invention it can be provided that the flow channel has a constant cross section in the sections, which can have a favorable effect on the vortex formation. This can apply to at least a large part of the sections mentioned.

Alternatively or additionally, it can be provided that the flow channel in the sections, viewed in the flow direction of the fluid, at least one for example, has a conical taper of its cross section. This can be the case, for example, in the area of the inlet opening. Furthermore, the flow channel in the sections can also have an expansion of its cross section, preferably in the region or in the direction of the outlet opening.

In order to further optimize the vortex formation mentioned, another development of the overflow according to the invention is characterized in that the sections have a certain length L, which can be numerically linked to a diameter D of the section. The following can apply: L = f · D. The factor f can be between approximately 2 and approximately 5, and in turn can depend on the diameter D, f = f (D).

In order to enable a sufficient overflow of up to 12 l / min, another development of the overflow according to the invention provides that the sum of the cross sections of the sections is in the range of approximately 175 mm ² , most preferably between approximately 150 mm ² and approximately 200 mm ^2nd

It can also be advantageous if the plurality of sections are essentially identical to one another, but without the invention being restricted to this.

At least one of the several sections mentioned can be arranged in the region of the inlet opening of the overflow, for example in the region of a so-called overflow head. The overflow head is the part of the overflow that is physically mounted on the or the sink in the area of an overflow opening of the sink or sink. The same applies to the inlet opening in the area of an overflow trough or a separate spout.

Alternatively or additionally, however, it can be provided that one of the above-mentioned several sections is arranged in the region of the outlet opening of the overflow, that is to say more in the direction of the sink outlet.

In principle, however, the circular flow channel sections can also be at any other point of the overflow or the overflow flow channel be arranged. Accordingly, another development of the overflow according to the invention provides that at least one of the plurality of sections mentioned is arranged in the region of an elbow of the flow channel, which elbow converts a first section of the flow channel, which is vertical when installed, into a second section of the flow channel, which is horizontal when installed. The at least one flow channel section can be arranged in the area of the first section (ie vertically) and / or in the area of the second section (ie horizontally).

An advantageous retrofit element can be designed to be fitted into an existing overflow. An outer contour of the retrofit element can essentially correspond to an inner contour of the overflow in one area. In this way, the retrofit element can be used inside as an insert in an existing overflow. This can basically happen at any point of the overflow, e.g. also in the overflow head. However, the overflow head mentioned above, if it includes the circular flow channel sections mentioned, can itself be regarded as a retrofit element because it can replace an existing overflow head of an existing overflow. The same applies to the angled piece or angled part or to any other section of an existing overflow flow duct: This can be retrofitted according to the invention by being replaced by a corresponding part which has the circular flow duct sections. Accordingly, the retrofit element then forms at least a partial section or segment of the overflow flow channel.

In this way, virtually all existing overflows can be retrofitted in a flow-optimized manner in a simple and cost-effective manner within the meaning of the present invention.

Figur 1

zeigt schematisch, teilweise im Schnitt, eine Spüle mit einem Überlauf;

Figur 2

zeigt den Überlaufkopf eines Überlaufs in perspektivischer Darstellung.

Figur 3

zeigt den Überlaufkopf aus Figur 2 in einer anderen perspektivischen Darstellung.

Figur 4

zeigt verschiedene weitere Ansichten des Überlaufkopfs aus Figur 2 und 3;

Figur 5

zeigt schematisch eine alternative Ausgestaltung der Spüle aus Figur 1, teilweise im Schnitt;

Figur 6

zeigt eine alternative Spülenform mit Überlaufmulde; und

Figur 7

zeigt eine weitere alternative Spülenform mit separatem Ausguss.

The following drawings show some exemplary embodiments of an overflow and sink according to the preamble of claims 1 and 11.

Figure 1

shows schematically, partly in section, a sink with an overflow;

Figure 2

shows the overflow head of an overflow in a perspective view.

Figure 3

shows the overflow head Figure 2 in a different perspective view.

Figure 4

shows various other views of the overflow head Figures 2 and 3 ;

Figure 5

shows schematically an alternative embodiment of the sink from Figure 1, partly in section;

Figure 6

shows an alternative sink shape with overflow trough; and

Figure 7

shows another alternative sink shape with separate spout.

In Figure 1 schematically and partially in section, a sink, in particular a kitchen sink, is shown, which is designated overall by the reference numeral 1. The sink 1 comprises at least one sink basin 2, of which only a lower corner area is shown here, which comprises a basin wall 3 and a basin floor 4. In the pool floor 4, a drain opening is provided at reference number 5, which communicates fluidically with a sink drain 6, which is known per se. In the area of the drain opening 5, a stopper or valve plug 7 is arranged, which in the exemplary embodiment shown closes the drain opening 5 in a fluid-tight manner, so that no water can flow out of the sink 2 through the drain opening 5. As a result, rinse water up to a schematically represented water level 9 is contained in the sink 2. The water level 9 lies at the level of an opening 10 in the basin wall 3, which opening 10 can also be referred to as an overflow opening. The opening 10 cannot be seen in FIG. 1 due to the type of representation chosen.

In the area of the opening 10, the so-called overflow head 11 of a known overflow 12 is mounted on the outside of the basin wall 3, via which overflow 12 water 8 can flow from the sink 2 to the sink drain 6 when the water level 9 within the sink 2 has a certain level Level reached or exceeded. In addition to the already mentioned overflow head 11, the overflow 12 comprises an inlet opening 13 in the area of the overflow head 11, which inlet opening 13 communicates with the already mentioned opening 10 in the basin wall 3 of the sink basin 2. A seal is regularly arranged around the inlet opening 13 in order to seal the overflow head 11 in a fluid-tight manner with respect to the basin wall 3. This seal is in Figure 1 not visible. According to the overflow head 11 Figure 1 an angled overflow pipe 14, which defines at its end facing away from the overflow head 11 an outlet opening 15 through which the overflow 12 opens into the sink outlet 6. Inlet opening 13, overflow head 11, overflow pipe 14 and outlet opening 15 thus define a flow channel 14a from the opening 10 in the basin wall 3 of the sink basin 2 to the sink outlet 6, so that water 8 can flow out of the sink basin 2 through the overflow 12 when the water level 9 - as already stated - reaches or exceeds a certain level (a certain level).

So far based on Figure 1 The configuration described is known per se and is used regularly in commercially available (kitchen) sinks, such as the sink 1 shown. The present invention now relates to improvements in the area of the overflow 12, in particular the overflow head 11.

Figure 2 shows an overall perspective view of an overflow head 11 'of an overflow according to the invention, which in Figure 2 is not shown further. For the other design features of the overflow, please refer to the one already explained in detail Figure 1 referred.

The overflow head 11 'according to Figure 2 also includes the approximately rectangular inlet opening 13 already mentioned, which is surrounded by a correspondingly shaped sealing surface 16. Approximately in the center of the otherwise slightly funnel-shaped inlet opening 13, an approximately circular-cylindrical reinforced structure 17 is arranged centrally, which has a mounting hole 18 for fastening the overflow head 11 'in the region of the basin wall 3 (cf. Figure 1 ) trains. In a lower boundary surface 19 of the inlet opening 13 there are four openings or bores 20.1 to 20.4 arranged side by side in a row that extend parallel to each other through a connecting piece 21 of the overflow head 11 '. These openings or bores 20.1 to 20.4 each define a flow channel section of the overflow 12 (cf. Figure 1 ) and each have an approximately circular cross section, which is particularly the further perspective view in Figure 3 can be seen well. The connecting piece 21 of the overflow head 11 'has externally projecting shapes which can be used to fasten a pushed-on pipe or hose (not shown) or for reinforcement purposes.

Figure 3 shows the overflow head 11 'in a further perspective view obliquely from below, so that the formation and arrangement of the openings / bores or flow channel sections 20.1 to 20.4 can be easily recognized. As already stated, these lie next to one another on a line (based on their virtual centers; not shown) and each have approximately the same diameter D. However, the overflow according to the invention is in no way limited to the arrangement, number or size of the openings / bores 20.1 to 20.4 shown here.

For example, the openings / bores 20.1-20.4 can also have different diameters D, and there may be more or fewer than the four openings / bores 20.1-20.4 shown. In addition, according to the invention, these can be arranged next to one another, in the manner of a triangle, offset or arranged in a zigzag, or in the manner of a square or the like. Alternatively, in contrast to the invention, only one such breakthrough can be present. It is essential in any case that the opening or, according to the invention, the openings have or have an approximately circular diameter, although the connecting piece 21 of the overflow head 11 or its inlet opening 13 has a different geometry (oval or rectangular). The applicant has found that the presence of circular flow channel sections results in a significantly improved flow behavior of the overflowing water in the area of the overflow, comparable to the improved leakage of water from an overhead bottle when it simultaneously rotates around the bottle's longitudinal axis becomes.

The openings / bores 20.1-20.4 can have a final widening in the area of the inlet opening 13 and / or in the area of a free (lower) end of the connecting piece 21, as in FIG Figure 3 is exemplified at 22.4 for the bore 20.4.

Figure 4 shows further views of the overflow head 11 'according to the Figures 2 and 3 .

In partial illustration 4a), the overflow head 11 'is corresponding in a side view Figure 1 shown. This is not to be discussed further here. However, you can recognize those above by Figure 2 The aforementioned funnel-like tapering of the inlet opening 13 starting from the sealing surface 16 to the inside (left in Figure 4a ).

Part 4b) shows the overflow head 11 'in a view from the front. The reinforced structure 17 with the mounting hole 18 and the circumferential sealing surface 16 are clearly visible.

Partial illustration 4c) illustrates the position of a section line BB, which is shown corresponding to the overflow head 11 'in the sectional view according to partial illustration 4d). Is clearly recognizable in Figure 4d ) the location and formation of the flow channel sections or breakthroughs / holes 20.1 - 20.4 with approximately the same diameter D, which can be identical for all four holes 20.1 - 20.4, which in Figure 4d is not recognizable due to the selected sectional representation. Reference symbol L denotes an axial length of the flow channel sections or openings / bores 20.1-20.4, which can also be identical for all four flow channel sections and essentially the entire axial length L of the connecting piece 21 from the inlet opening 13 to its free one End corresponds.

Figure 5 schematically shows an alternative embodiment of the overflow (in Figure 5 designated by reference numeral 12 '), in which, as an alternative or in addition to the flow channel sections with a circular cross section formed in the area of the overflow head 11, 11', a (further) such flow channel section is provided in the area of the overflow pipe 14. The mentioned further flow channel section is special with reference numerals 20.5 designated and arranged in the area of an elbow 14.1, which connects a first pipe part 14.2, which is connected to the connecting piece 21 of the overflow head 11, 11 'in an extension thereof, with a second pipe part 14.3, which is connected to the sink outlet 6 and the outlet opening 15 of the overflow 12 'defined. The angle piece or angle part 14.1 is in Figure 5 shown hatched. Instead of the one further flow channel section 20.5 shown, a plurality of such sections can in turn be provided in a virtually arbitrary arrangement relative to one another, whereupon the Figures 2 and 3 has already been pointed out. It is also possible for the at least one further flow channel section 20.5 to extend completely through the angle piece 14.1, that is to say also beyond its bend.

As the person skilled in the art recognizes, the at least one flow channel section 20.5 could alternatively also be arranged in the region of the first pipe part 14.2 and / or the second pipe part 14.3. In all of these cases, the proposed improvement in the area of a (sink) overflow can also be achieved by retrofitting an existing overflow in an existing sink, for example by retrofitting a corresponding pipe or angle part 14.1 - 14.3 or using it accordingly is used in an existing overflow. The same applies to the overflow head 11 ', which can replace an existing, known overflow head 11.

Without limitation, it has proven to be particularly advantageous if the diameter D of the openings / bores mentioned is in the range from 2 to 35 mm, with a corresponding plurality of openings having to be provided for smaller diameters D. The applicant has found that a minimum cross section summed over all openings or bores should be in the range from approximately 150 mm ² to approximately 200 mm ² , preferably approximately 175 mm ² . A preferred length L of the openings / bores is approximately 5 to 150 mm and can depend on the selected diameter D: L = f · D, where f = f (D) can have a value between approximately 2 and approximately 5.

The invention is not limited to use in the area of a sink, but can alternatively or additionally be used in the area of a so-called overflow trough or a separate spout.

Figure 6 shows a rinse 1 'with overflow trough 2'. This overflow trough 2 'has an opening 10' (in the installed state) which is arranged horizontally, below which an overflow according to the invention (not shown here) is mounted or can be fitted, in order to make its advantages usable for such sinks 1 '.

Figure 7 shows a sink 1 "with a separate spout 2". This spout 2 "likewise has a horizontally arranged opening 10" (in the installed state), below which an overflow according to the invention (not shown here) is mounted or can be fitted, in order to make its advantages usable for such sinks 1 ".

Of course, an overflow according to the invention in the sinks 1 ', 1 "can be carried out according to Figure 6 or 7 can also be provided in the area of the basin 2, as described above.

Claims (11)

1. Overflow (12, 12') for a sink (1, 1', 1"), having at least one inlet opening (13) which is intended for mounting on a basin (2) or an overflow tray (2') or a separate drain outlet (2") of the sink (1, 1', 1"), and having an outlet opening (15) which is intended for mounting at an outlet (6) or venting valve of the sink (1, 1', 1"), wherein between the inlet opening (13) and the outlet opening (15) there is arranged a flow channel (14a) for a fluid (8), there being provided in the flow channel (14a) at least one section (20.1-20.4; 20.5) in which the flow channel (14a) has a substantially circular cross-section,
   characterised in that
   a plurality of such sections of circular cross-section (20.1-20.4) are arranged in parallel in the flow channel (14a), the sections (20.1-20.4) being arranged one next to the other, triangle-like, offset or in a zig-zag, in each case in relation to the position of their centre points.
2. Overflow (12, 12') according to claim 1, characterised in that the flow channel (14a) has, in the sections, a constant cross-section.
3. Overflow (12, 12') according to claim 1, characterised in that the flow channel (14a) has, in the sections, at least one tapering of its cross-section in the direction of flow of the fluid (8).
4. Overflow (12, 12') according to any one of claims 1 to 3, characterised in that the sections have a length L, for which the following applies:
   L ≥ f x D, 2 ≤ f ≤ 5, if D denotes a diameter of the section, f denotes a factor, and wherein preferably 2 mm ≤ D ≤ 35 mm.
5. Overflow (12, 12') according to claim 4, characterised in that a sum of the cross-sections of the sections (20.1-20.4) is at least approximately 175 mm².
6. Overflow (12, 12') according to any one of claims 1 to 5, characterised in that the sections (20.1-20.4) are arranged in the region of the inlet opening (13).
7. Overflow (12, 12') according to any one of claims 1 to 6, characterised in that the sections (20.1-20.4) are arranged in the region of an overflow head (11') of the overflow.
8. Overflow (12, 12') according to any one of claims 1 to 5, characterised in that the sections are arranged in the region of the outlet opening (15).
9. Overflow (12, 12') according to any one of claims 1 to 5 or claim 8, characterised in that the sections are arranged in the region of an angle piece (14.1) of the flow channel (14a), which angle piece (14.1) provides a transition from a first section (14.2) of the flow channel (14a), which first section is vertical when mounted, to a second section (14.3) of the flow channel (14a), which second section is horizontal when mounted.
10. Overflow (12, 12') according to claim 9, characterised in that the sections are arranged in the region of the second section (14.3).
11. Sink (1, 1', 1") having at least one overflow (12, 12') which comprises an opening (10) in a side wall (3) of a basin (2) or an opening in a horizontal surface of the sink, preferably in the region of an overflow tray (2') or a separate drain outlet (2"), which opening (10) is in fluidic communication with an outlet of the sink (1) via the overflow (12, 12'),
    characterised in that
    the overflow (12, 12') is constructed in accordance with any one of claims 1 to 10.

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