EP2501865B1 - Water-carrying line section having an aerating duct - Google Patents

Description

The invention relates to a water-conducting line section which has at least one ventilation channel, which ventilation channel has at least one channel opening open to the atmosphere on the inlet side and at least one channel opening which can be flushed by the passing water and / or adjoining channel opening and in which ventilation channel a water jet aerator is provided Filtering or separating device which is permeable to air in the direction of the at least one inlet-side channel opening to at least one outlet-side channel opening, but in the opposite direction, wherein the Wasserstrahlbelüfter has a mounting housing, which is intended for releasable installation in a valve body, and wherein the at least one ventilation channel penetrates the installation housing.

From the reservation DE 10 2006 021 801 A1 the applicant is already known as a sanitary outlet fitting water-bearing line section known, which has a ventilation channel at a distance below its water outlet. The ventilation channel has on the inlet side open to the atmosphere channel opening, while on the outlet side of the ventilation channel is provided by the water flowing through the outlet fitting water umspülbare channel opening. In the ventilation duct, a water jet aerator is provided which is permeable to air in the direction from the inlet-side channel opening to the outlet-side channel opening, but is designed to be impermeable to water in the opposite direction. In the DE 10 2006 021 801 A1 provided filter or separator which is intended to prevent leakage of water during the withdrawal of water at the outlet fitting is formed as a one-way vent valve. Such a one-way vent valve However, may not completely prevent that after closing the shut-off valve part of the between aerator and water outlet first remaining and then back flowing water column unintentionally passed through the provided in the aeration device one-way vent valve and visible on the outside of the outlet fitting as a trickle or by evaporation caused lime traces becomes.

From the EP 0 377 067 A1 already known a locking device, which serves to shut off provided with a ventilation and sealed housings against water ingress. The previously known locking device has a carrier body and a non-planar in the carrier body formed membrane. This membrane is gas permeable, but impermeable to water. In the support body are located on the outside of several liquid drainage channels, which are arranged such that possibly collects on the membrane collecting water, which collects due to the non-planar arrangement of the membrane at certain points, to the outside and thus ensures the gas permeability of the membrane , An indication that this prior art locking device should also be usable in a water-carrying line section and in particular on a sanitary outlet fitting is the EP 0 377 067 A1 but not to be seen.

There is therefore in particular the task of creating a water-bearing line section with a water jet aerator, which prevents unwanted leakage of water from the ventilation duct with security in any installation situation of the outlet fitting.

The achievement of this object is in the water-carrying line section of the type mentioned in particular that the filter or separator of the water jet aerator has a porous membrane having an air-permeable, but water-impermeable structure and / or layer.

The line section according to the invention is associated with a water jet aerator, which has a mounting housing, which is intended for releasable installation in a valve body.

Since the water jet aerator has a built-in housing that can be detachably inserted into a fitting housing, the fitting housing usually made of metal can be made separately from the water jet aerator and completed after the manufacturing process with the water jet aerator. According to the invention, it is provided that the at least one ventilation channel penetrates the installation housing. This at least one ventilation channel has on the inlet side at least one channel opening open to the atmosphere and on the outlet side at least one channel opening which can be flushed around by the water flowing through the line section and / or adjacent thereto. In this ventilation channel designed as a membrane filter or separator is interposed. This filter or separating device is permeable to air in the direction of the water-conducting housing interior of the fitting housing and thus allows the required air circulation for aerating the water jet. In the opposite direction, however, this filter or separating device is designed impermeable to water, so that water can not escape through the ventilation channel in any case and can be distracting, for example, on the outer circumference of the water-carrying line section and thus also on the outside of serving as a line section sanitary outlet fitting by Kalkränder. Due to their selective permeability and their structure, the filter or separator can clean the sucked air - depending on the pore size - of germs or other contaminants that would otherwise get into the effluent water and from there, for example, on the hand or a food to be washed and could be questionable for reasons of hygiene.

A preferred embodiment therefore provides that the air-permeable but water-impermeable structure and / or layer has a polytetrafluoroethylene, polyethylene or polyamide layer or coating and / or that the porous membrane is formed as a woven or sintered material.

A preferred embodiment provides that the membrane is made of in particular stretched polytetrafluoroethylene or of an open-pore polyester structure.

The membrane provided in the filter or separating device may, for example, be designed as a porous membrane which has an air-permeable but water-impermeable structure and / or layer. Such membranes are, for example, in the textile industry under the trade name "GORE-TEX" on the market.

In order to delay or completely prevent the clogging of the membrane pores, it can be advantageous if the filter or separating device preferably has at least one outlet side Prefilter has formed nonwoven structure. This nonwoven structure arranged on the outlet side and thus on the water side serves to protect the membrane provided in the filter or separating device. This nonwoven structure, which is preferably arranged on the water side, can be provided, for example, for keeping clean the membrane-forming porous or gas-permeable films or layers.

A preferred embodiment of the invention provides that the filter or separating device preferably has on the inlet side a fabric or the like mechanically stabilizing support structure. This support structure serves for mechanical stabilization of the filter or separating device according to the invention and the membrane provided in it. In addition, however, this support structure can also have an additional filter function.

It is particularly advantageous if the membrane is arranged between an outlet-side prefilter and a mechanically stabilizing support structure arranged on the inlet side.

In order to favorably influence the filtering or separating device of the water jet aerator provided according to the invention with further product properties, it can be advantageous if the filtering or separating device carries at least one layer for oleophobization and / or for microbiological passivation. An embodiment is preferred in which the layer has silver ions.

It is particularly advantageous if the inlet-side carrier layer and / or the outlet-side prefilter is designed as a layer for oleophobization and / or as a layer for microbiological passivation.

A preferred application example is that the water jet aerator is intended for releasable and preferably interchangeable installation in serving as a water-carrying line section fitting housing a sanitary outlet fitting. It is also possible, however, that the ventilation channel provided for receiving the water jet aerator used in accordance with the invention is provided in the peripheral wall of another water-conducting line section, for example a pipe section. In order to be able to interpose the water jet aerator as simply as possible in the ventilation duct provided in a fitting housing or another line section, it is expedient for the water jet aerator to have an installation housing which is intended for interchangeable installation in the fitting housing of a sanitary outlet fitting and / or at least one Ventilation channel penetrates.

Through the water jet aerator according to the invention around the outlet fitting around ambient air is sucked into the water-bearing housing interior of the valve body and mixed inside the housing with the water passing through. A preferred embodiment according to the invention therefore provides that at least one cross-sectional constriction is provided in the line section, which causes a negative pressure in the region of at least one outlet-side channel opening by a cross-sectional acceleration of the water flowing through, and that the cross-sectional constriction thereto at least one outlet-side channel opening in water. Flow direction is connected upstream. If the water flowing through the outlet fitting or line section is accelerated, a vacuum can be generated according to the Bernoulli equation which can be used to draw in the ambient air through the water jet aerator.

In this case, a preferred embodiment according to the invention provides that the cross-sectional constriction provided in the flow guide has at least one perforated field arranged transversely to the water flow.

Such a perforated field, which has a number of flow holes, represents a cross-sectional constriction, which leads to an acceleration of the water flowing through. In order to additionally favor an acceleration of the water flowing through and to additionally increase the resulting negative pressure, it is expedient if the perforated field has a number of flow holes, which have a larger hole cross-section on the inlet side compared to the outlet side.

In this case, a rapid and low-noise acceleration of the water flowing through the hole field is still favored when the perforated field has flow holes, the inlet side have a funnel-shaped narrowing hole section.

It is possible that at least one membrane or the like filtering or separating device is held detachably or non-detachably in a built-in housing preferably designed as an insert cartridge.

An embodiment according to the invention provides that the at least one membrane or similar filtering or separating device is snapped or firmly connected, in particular pressed, glued or welded, to the peripheral edge region delimiting the at least one ventilation channel. It is expedient if the filter or separating device with the, the at least one ventilation duct bounding peripheral edge region is tightly connected.

The various functions of the filter or separating device provided according to the invention can still be favored if at least one membrane and / or a filter, preferably upstream on the inlet side, are fixed to a maximum amount of air per unit time and / or designed to clean the air.

In this case, a preferred embodiment according to the invention provides that the filter or separating device is part of an insertable into the installation housing of the water jet aerator insertable cartridge and that the cartridge is for exchange purposes preferably accessible from the outside of the mounting housing.

A particularly advantageous development according to the invention provides that the installation housing is designed as a particular cylindrical hollow body which carries at least one membrane or the like filter or separator in the region of its hollow body interior and the one on its hollow body peripheral wall, as a cross-sectional constriction has trained flow-through wall portion has.

Further developments according to the invention will become apparent from the following description and the claims. The invention will be described in more detail below with reference to preferred embodiments.

Fig. 1

eine, in einem Längsschnitt dargestellte und als wasserführender Leitungsabschnitt dienende Auslaufarmatur mit einem Armaturengehäuse, das einen Belüftungskanal hat, in den ein Wasserstrahlbelüfter einsetzbar ist, der eine Filter- oder Trenneinrichtung aufweist, die in Richtung zum Gehäuseinneren des Armaturengehäuses luftdurchlässig, aber in die entgegengesetzte Richtung wasserundurchlässig ist,

Fig. 2

die Auslaufarmatur aus Fig. 1 in einem Detail-Längsschnitt im Bereich ihres als auswechselbare Einsetzpatrone ausgestalteten Wasserstrahlbelüfters,

Fig. 3

die in dem Detail-Längsschnitt gezeigte Auslaufarmatur aus Fig. 1 und 2 mit, aus dem Armaturengehäuse ausgebautem Wasserstrahlbelüfter,

Fig. 4

eine, in einem Längsschnitt dargestellte und ebenfalls als wasserführender Leitungsabschnitt dienende Auslaufarmatur, die in ihrem wesentlichen Aufbau mit der Auslaufarmatur gemäß den Fig. 1 bis 3 übereinstimmt, - bei der jedoch in dem Belüftungskanal ein scheibenförmiger Wasserstrahlbelüfter eingesetzt und mittels eines Vorsatz- oder Filtersiebes eingespannt bzw. gesichert ist, der dem Wasserstrahlbelüfter zusätzlich auch einen mechanischen Schutz bietet,

Fig. 5

die Auslaufarmatur aus Fig. 4 in einem Detail-Längsschnitt im Bereich ihres scheibenförmigen Wasserstrahlbelüfters,

Fig. 6

die in den Detail-Längsschnitt gezeigte Auslaufarmatur aus Fig. 4 und 5 mit aus dem Armaturengehäuse ausgebautem Wasserstrahlbelüfter, und

Fig. 7

in einem schematischen Detail-Längsschnitt den Schichtenaufbau des in den Fig. 1 bis 6 verwendeten Wasserstrahlbelüfters.

It shows:

Fig. 1

a, shown in a longitudinal section and serving as a water-carrying line section outlet fitting with a fitting housing having a ventilation duct, into which a water jet aerator can be inserted, which has a filter or separating device, which is permeable to air in the direction of the housing interior of the fitting housing, but impermeable in the opposite direction,

Fig. 2

the outlet fitting off Fig. 1 in a detailed longitudinal section in the area of its designed as a replaceable cartridge cartridge water jet aerator,

Fig. 3

the outlet fitting shown in the detail longitudinal section Fig. 1 and 2 with water jet aerator removed from the valve body,

Fig. 4

a, shown in a longitudinal section and also serving as a water-carrying line section outlet fitting, in its essential structure with the outlet fitting according to the Fig. 1 to 3 - However, in which a disc-shaped water jet aerator is used in the ventilation channel and clamped or secured by means of a filter attachment or filter, which also provides the water jet aerator mechanical protection,

Fig. 5

the outlet fitting off Fig. 4 in a detail longitudinal section in the region of its disk-shaped water jet aerator,

Fig. 6

the outlet fitting shown in the detail longitudinal section 4 and 5 with removed from the valve body water jet aerator, and

Fig. 7

in a schematic detail longitudinal section of the layer structure of the in the Fig. 1 to 6 used water jet aerator.

In the Fig. 1 to 6 a water-conducting line section 1 can be seen, which has a ventilation channel. The line section 1 can be formed as a peripheral wall of a pipe section or - as here - as a valve housing 3 a sanitary outlet fitting 4. The ventilation channel 2 provided in the line section 1 has at least one channel opening 5 open to the atmosphere on the inlet side and at least one channel opening 6 flushable by the passing water on the outlet side.

In the ventilation channel 2, a water jet aerator 7 is interposed, which serves to produce a ventilated and thus pearly-soft water jet. The water jet aerator 7 is intended to prevent leakage of water from the water-carrying line section 1 and at the same time ensure the passage of air through the ventilation channel 2.

The water jet aerator 7 has an in Fig. 7 Filtering or separating device 8 shown in more detail, which in the direction of the at least one inlet-side channel opening 5 to the at least one outlet-side channel opening 6 out air-permeable, but is configured impermeable to water in the opposite direction. As from the in Fig. 7 shown schematic layer structure of the filter or separator 8 is clear, this has a membrane 9, which has at least one air-permeable, but water-impermeable structure and / or layer. This air-permeable, but water-impermeable structure and / or layer of the membrane can be configured as a polytetrafluoroethylene layer or coating, but it is also possible that the membrane is made of a fabric or a sintered material. Preferred is an embodiment in which the membrane 9 is made of in particular stretched polytetrafluoroethylene or of an open-pore polyester structure.

In Fig. 7 It can also be seen that the filter or separating device 8 has a nonwoven structure 10 designed as a prefilter, which preferably-as here-is arranged on the outlet side and thus on the water side and serves to protect the membrane 9. Additionally or instead, the filter or separating device 8 may also comprise a fabric or the like mechanically stabilizing support structure 11, which - as here - is preferably arranged on the inlet side and thus on the air side. How out Fig. 7 becomes recognizable, the membrane 9 is arranged between the outlet-side pre-filter 10 and the inlet side, mechanically stabilizing support structure 11.

The support structure 11 gives the filter or separator sufficient mechanical stability. In addition, this support structure 11 may also have a filter function. Thus, a preferred embodiment according to the invention provides that the filter or separating device 8 carries at least one layer for oleophobization and / or for microbiological passivation. In this case, the carrier layer 11 and / or the pre-filter 10 may be formed as a layer for oleophobization and / or as a layer for microbiological passivation. Thus, further exemplary embodiments provide that the carrier structure 11 and / or the nonwoven structure 10 serving as a prefilter have an antibacterially active coating, which may in particular contain silver ions.

In the Fig. 1 to 6 can be seen that in the line section 1 at least one cross-sectional constriction 12 is provided which causes a cross-sectional acceleration of the water flowing through a negative pressure in the region of the outlet-side channel opening 6. In order to be able to suck in ambient air from the atmosphere through the ventilation channel 2 into the water with the aid of this negative pressure, the cross-sectional constriction 12 of the outlet-side channel opening 6 is connected upstream in the flow direction.

From the Fig. 3 and 6 It is clear that the water jet aerator 7 is intended for releasable and preferably interchangeable installation in the line section 1. In this case, the points in the Fig. 1 to 3 illustrated Wasserstrahlbelüfter 7 a mounting housing 13, which is intended for releasable and preferably replaceable installation in the ventilation duct 2 of the line section 1. Of the installation housing 13 having and in the Fig. 1 to 3 illustrated water jet aerator 7 thus forms a Einsetzpatrone, which is used in the fitting housing 3 of the sanitary outlet fitting 4.

Based on Fig. 6 are also embodiments conceivable in which the water jet aerator and in particular its separating device with the valve body permanently connected, for example, glued or welded, is.

In the 4 to 6 On the other hand, it is illustrated that the water jet aerator can also be configured as a multi-layered disk which can be inserted into the ventilation channel 2 in the fitting housing 3. From a comparison of Fig. 1 to 3 on the one hand and the 4 to 6 On the other hand, it is clear that the preferably multi-layer filter or separator 8 in the housing housing 13 or directly in the ventilation duct 2 can be clamped and secured by means of a front screen 14 or by means of another holder. In the Fig. 1 to 6 the front screen 14 also serves to protect the Wasserstrahlbelüfters 7 in particular from mechanical damage.

The filter or separator 8 with its membrane 9 can be permanently fixed in the ventilation channel or in the housing 13, for example glued, welded, clamped or snapped. Such an inseparable connection ensures, in particular, that the filter or separating device 8 is tightly connected to the peripheral edge region delimiting the at least one ventilation channel 2.

It can be advantageous if the membrane 9 and / or a filter connected upstream on the inlet side are fixed to a maximum amount of air which can be sucked in per unit time and / or is designed to clean the air.

Claims (18)

1. Water-conducting line portion (1) which has at least one aeration duct (2), which aeration duct (2) has, at the inlet side, at least one duct opening (5) open to the atmosphere and, at the outlet side, at least one duct opening (6) which can be washed around by, and/or is adjacent to, the water flowing past, and in which aeration duct (2) is provided a water jet aerator (7), which water jet aerator (7) has a filtering or separating device (8) which is designed to be permeable to air in the direction from the at least one inlet-side duct opening (5) to the at least one outlet-side duct opening (6) but so as to be impermeable to water in the opposite direction, wherein the water jet aerator (7) has an installation housing (13) which is designed to be detachably installed into a fitting housing, and wherein the at least one aeration duct (2) extends through the installation housing (13), characterized in that the filtering or separating device (8) of the water jet aerator (7) has a porous diaphragm (9) which has a structure and/or layer which is permeable to air but impermeable to water.
2. Line portion according to Claim 1, characterized in that the structure and/or layer which is permeable to air but impermeable to water has an acrylic, polytetrafluoroethylene, polyethylene or polyamide layer or coating, and/or in that the porous diaphragm (9) is formed as a fabric or sintered material.
3. Line portion according to one of Claims 1 or 2, characterized in that the diaphragm (9) is produced from in particular stretched polytetrafluoroethylene or from an open-pored polyester structure.
4. Line portion according to one of Claims 1 to 3, characterized in that the filtering or separating device (8) has, preferably at the outlet side, at least one nonwoven structure (10) formed as a pre-filter.
5. Line portion according to one of Claims 1 to 4, characterized in that the filtering or separating device (8) has, preferably at the inlet side, a fabric or similar mechanically stabilizing support structure (11).
6. Line portion according to one of Claims 1 to 5, characterized in that the diaphragm (9) is arranged between an outlet-side pre-filter (10) and a mechanically stabilizing support structure (11) arranged at the inlet side.
7. Line portion according to one of Claims 1 to 6, characterized in that the filtering or separating device (8) bears at least one layer for oleophobization and/or microbiological passivation.
8. Line portion according to Claim 7, characterized in that the layer designed for oleophobization and/or for microbiological passivation has silver ions.
9. Line portion according to one of Claims 1 to 8, characterized in that the water jet aerator (7) is designed to be detachably and preferably exchangeably installed into the water-conducting line portion.
10. Line portion according to one of Claims 1 to 9, characterized in that, in the line portion (1), there is provided at least one cross-sectional narrowing (12) which, by means of a cross-sectionally induced acceleration of the water flowing through, generates a negative pressure in the region of at least one outlet-side duct opening, and in that the cross-sectional narrowing (12) is for this purpose positioned upstream, as viewed in the flow direction, of said at least one outlet-side duct opening (6).
11. Line portion according to Claim 10, characterized in that the cross-sectional narrowing has at least one perforated area arranged transversely with respect to the water flow.
12. Line portion according to Claim 11, characterized in that the perforated area has a number of throughflow holes which have a larger hole cross section at the inlet side than at the outlet side.
13. Line portion according to Claim 11 or 12, characterized in that the perforated area has throughflow holes which, at the inlet side, have a hole portion which narrows in the shape of a funnel.
14. Line portion according to one of Claims 1 to 13, characterized in that the filtering or separating device is held in a detachable or non-detachable manner in the installation housing (13) or in a fitting housing (1).
15. Line portion according to one of Claims 1 to 14, characterized in that the filtering or separating device (8) is snapped into or fixedly connected to, in particular pressed into, adhesively bonded to or welded to, the circumferential edge region bordering the at least one aeration duct (2).
16. Line portion according to one of Claims 1 to 15, characterized in that the filtering or separating device is sealingly connected to the circumferential edge region bordering the at least one aeration duct (2).
17. Line portion according to one of Claims 1 to 16, characterized in that the diaphragm (9) and/or a filter preferably positioned upstream at the inlet side is set such that a maximum air quantity can be sucked in per unit time, and/or is designed for purifying the air.
18. Line portion according to one of Claims 15 to 17, characterized in that the installation housing is formed as an in particular cylindrical hollow body which, in the region of its hollow body interior, bears in each case at least one diaphragm (9) or similar filtering or separating device (8) and which, on its hollow body circumferential wall, has a wall portion which has at least one throughflow hole formed as a cross-sectional narrowing.

Images