Liquid purification element, liquid purification system and method for manufacturing a liquid purification element

Abstract

Liquid cleaning element (14) of or for a liquid cleaning system(s) (10), comprising at least one cleaning medium (28) and at least one carrier medium (26), wherein the at least one carrier medium (26) has at least one liquid connection (32) for at least one line for liquid to be cleaned or cleaned, the at least one cleaning medium (28) and the at least one carrier medium (26) are connected to each other, and the liquid cleaning element (14) has at least one bend in at least one section with the at least one cleaning medium (28) and the at least one carrier medium (26), wherein the at least one carrier medium (26) is prefabricated in the final shape of the liquid cleaning element (14) before being connected to the at least one cleaning medium (28), and wherein a liquid connection with a cylindrical suction nozzle (32) is arranged, in particular integrated, on the carrier medium (26).characterized in that, with respect to an axis (24) of the liquid cleaning system (10) viewed circumferentially, a positioning cylinder sleeve (34) is arranged in front of and behind the suction nozzle (32), respectively, for interaction with corresponding positioning cylinders (36) on the side of a pump mounting part (18) of a mounting (12) and for positioning the liquid cleaning element (14) relative to the mounting (12), wherein the imaginary axes of the positioning cylinder sleeves (34) are aligned parallel to an axis of the suction nozzle (32).

Description

Technical field

[0001] The invention relates to a liquid cleaning element, in particular a filter element, of or for a liquid cleaning system, comprising at least one cleaning medium, in particular a filter medium, and at least one carrier medium, wherein the at least one carrier medium has at least one liquid connection for at least one line for liquid to be cleaned or cleaned, the at least one cleaning medium and the at least one carrier medium are connected to each other, and the liquid cleaning element has at least one bend in at least one section with the at least one cleaning medium and the at least one carrier medium.

[0002] Furthermore, the invention relates to a liquid cleaning system, in particular a filter, with at least one liquid cleaning element, in particular a filter element, and at least one holder for the at least one liquid cleaning element, wherein the at least one liquid cleaning element comprises at least one cleaning medium, in particular a filter medium, and at least one carrier medium, wherein the at least one carrier medium has at least one liquid connection for at least one line for liquid to be cleaned or cleaned, the at least one cleaning medium and the at least one carrier medium are connected to each other, and the liquid cleaning element has at least one bend in at least one section with the at least one cleaning medium and the at least one carrier medium.

[0003] Furthermore, the invention relates to a method for manufacturing a liquid purification element, in particular a filter element, comprising at least one carrier medium, at least one purification medium, in particular a filter medium, and at least one bend in at least one section comprising the at least one carrier medium and the at least one purification medium, wherein in the method the at least one carrier medium and the at least one purification medium are connected to each other. State of the art

[0004] DE 23 23 513 A discloses a filter device consisting of a hollow cylindrical support member with channels for the filtered medium passing through the cylindrical wall of the member and with a filter material supported by the cylindrical support member. The filter material is in the form of a simple cylinder, and an arcuate side of the simple cylinder made of the filter material is supported by a curved side of the support member. The medium to be filtered passes first through the filter material and then through the support member.

[0005] From DE 10 2014 103 715 A1, a multi-layered liquid cleaning element is known, comprising a liquid-permeable top layer and a liquid-tight base. The base has a suction port for drawing liquid through the liquid cleaning element. At least the top layer and the base are connected to each other. The base has a structured surface that is at least partially directed towards the top layer. The liquid cleaning element is arranged in a receptacle on a device and adapted to an outer surface of a housing. Additionally, a cover element may be provided, which permanently fixes the liquid cleaning element to the housing or the outer surface of the housing.

[0006] The invention is based on the objective of designing a liquid cleaning element, liquid cleaning system and a method of the type mentioned above, in which the mechanical stability of the liquid cleaning element is improved. Disclosure of the invention

[0007] This problem is solved according to the invention by one of the independent claims.

[0008] The at least one carrier medium is prefabricated in its final geometric shape. Only then is the prefabricated carrier medium connected to the at least one cleaning medium. In this process, the at least one cleaning medium can be mechanically adapted to the shape of the carrier medium without stress. Thus, the carrier medium can be connected to and remain connected to the cleaning medium without mechanical stress. In contrast to the basis of the liquid cleaning element known from the prior art, the material of the carrier medium does not tend to return to its original flat state. Overall, this reduces stresses on the material of the carrier medium and / or the material of the cleaning medium. In particular, deformations, cracks, and / or stresses in the components can be avoided.Unlike liquid cleaning elements, which are formed, particularly bent, only after the at least one cleaning medium and the at least one support medium have been combined, the invention prevents the at least one cleaning medium from slipping on the at least one support medium during or after forming, particularly in order to return to its original position. Overall, the invention improves the mechanical stability of the liquid cleaning element.

[0009] The at least one carrier medium can advantageously serve as a back wall for the at least one cleaning medium. The at least one carrier medium can thus define the shape and mechanical stability of the liquid cleaning element.

[0010] By shaping the at least one carrier medium before connecting it to the at least one cleaning medium, a higher dimensional tolerance can be achieved. The liquid cleaning element retains its final geometry and does not attempt to relax into a flat position, as can happen with subsequently deformed liquid cleaning elements.

[0011] The at least one carrier medium has at least one liquid connection for the liquid to be cleaned or for the liquid to be cleaned. A suitable liquid supply or discharge can be easily connected to this at least one liquid connection. The at least one cleaning medium can be applied to the at least one carrier medium with the existing at least one liquid connection with minimal effort.

[0012] Advantageously, at least one liquid connection can have or form at least one outlet, in particular a suction connection for drawing in liquid, or at least one inlet for liquid. The liquid can be drawn in or pumped through the liquid purification element via the at least one liquid connection.

[0013] At least one line, which can be connected to the at least one liquid connection, can be connected to or be part of a pump or the like. The at least one line can be an inlet or an outlet of a pump, or be connected to the inlet or the outlet. The pump can thus be directly connected to the at least one liquid connection.

[0014] Advantageously, at least one liquid connection can have a nozzle, i.e., a suction nozzle, particularly in the form of a pipe nozzle. The suction nozzle can be cylindrical. The suction nozzle can also be integrated into the liquid connection. A suction nozzle can also serve as a mechanical connection for corresponding lines. Furthermore, a nozzle itself can serve as a line component. These embodiments are particularly advantageous for suction filters in tank systems, which are also used in complex installation situations, even with partial filling with liquid below the suction nozzle. Moreover, these embodiments allow for an advantageously one-piece design of the carrier medium and suction nozzle, thereby reducing costs. Furthermore, the increased dimensional stability combined with installation space flexibility is particularly advantageous in these embodiments.

[0015] The at least one liquid connection can advantageously be integrated into the at least one carrier medium. In this way, the at least one liquid connection can be prefabricated together with the at least one carrier medium and / or connected to the at least one cleaning medium. This reduces overall manufacturing, component, and / or assembly costs.

[0016] Advantageously, the at least one liquid connection can be connected to a space between the at least one carrier medium and the at least one cleaning medium. In this way, liquid can be removed from the space through the at least one liquid connection. Alternatively, if the liquid flows in the opposite direction through the liquid cleaning element, liquid can be introduced into the space through the at least one liquid connection.

[0017] Advantageously, the at least one intermediate space can be pressurized, in particular by means of the at least one liquid connection, with a pressure, in particular a vacuum or a positive pressure. In this way, liquid to be cleaned or cleaned can be drawn into the intermediate space by the at least one cleaning medium or, accordingly, forced out of it.

[0018] Advantageously, the at least one carrier medium, in particular the material of the at least one carrier medium, can be impermeable to liquid. In this way, the space between the at least one carrier medium and the at least one cleaning medium can be sealed on the side of the at least one carrier medium. When the space is subjected to pressure, in particular negative or positive pressure, the liquid must flow through the at least one cleaning medium and cannot escape through the at least one carrier medium.

[0019] Advantageously, at least one of the cleaning media can be permeable to liquids. In this way, the liquid can flow through the at least one cleaning medium and be cleaned in the process.

[0020] Advantageously, at least one cleaning medium can be designed as a filter medium. A filter medium can be used to filter particles out of the liquid. Accordingly, the liquid cleaning system can be a liquid filter. Alternatively or additionally, at least one cleaning medium can have a cleaning effect that differs from simple filtration.

[0021] The liquid cleaning system, in particular the liquid cleaning element, can advantageously be arranged in a piping system and / or a tank for liquid. In this way, it can be directly exposed to and / or filtered by the liquid and clean it.

[0022] Advantageously, the liquid cleaning system, in particular the liquid cleaning element, can be used in conjunction with an internal combustion engine and / or a motor vehicle.

[0023] The liquid cleaning system, in particular the liquid cleaning element, can be used in conjunction with an exhaust gas cleaning system.

[0024] Advantageously, the liquid purification element can be part of a filter for urea solution, in particular aqueous urea solution or urea-water solution. The filter can advantageously be used in conjunction with a so-called SCR catalyst for the selective catalytic reduction of nitrogen oxides in exhaust gases. The SCR catalyst can be part of an exhaust system of an internal combustion engine, in particular of a motor vehicle.

[0025] However, the invention is not limited to a filter for urea (water) solution in the internal combustion engine of a motor vehicle. Rather, it can also be used in other types of fluid systems, in particular fuel systems, engine oil systems, hydraulic systems, coolant systems, or the like, in motor vehicles or other machines, especially agricultural or construction machinery. The fluid purification system, in particular the fluid purification element, can also be used outside of automotive engineering, especially in industrial engines.

[0026] The invention can be used in motor vehicles, in particular passenger cars, trucks, buses, agricultural and / or construction vehicles, construction / agricultural machinery, compressors, industrial engines or other equipment, especially with internal combustion engines.

[0027] In an advantageous embodiment, the at least one support medium may be elastically deformable. In this way, the shape of the filter element can be determined and maintained by the at least one support medium. "Easily elastically deformable" within the meaning of the invention means that the at least one support medium may be elastically deformable or not, or at least not deformable without damage.

[0028] Advantageously, at least one of the support media can be elastically deformable. In this case, it can return to its original state after the removal of a deforming force. Furthermore, manufacturing, component, and / or operational tolerances can be better compensated for.

[0029] Advantageously, the at least one carrier medium can be non-deformable, and in particular, non-deformable. In this case, it can exhibit increased stability. This also prevents any deformations, especially elastic ones, from leading to impairment, and in particular destruction, of the at least one cleaning medium and / or the connection between the at least one cleaning medium and the at least one carrier medium.

[0030] In a further advantageous embodiment, the at least one carrier medium can be realized as an injection-molded and / or cast part, or a bent, stamped, or pressed part. In this way, the at least one carrier medium can also be equipped with complex shapes. In particular, at least one liquid connection and / or, if applicable, at least one drainage structure can be integrated into the at least one carrier medium during the same manufacturing process.

[0031] In a further advantageous embodiment, at least one carrier medium can comprise or consist of plastic and / or metal. Plastic can be easily processed and shaped, particularly by injection molding and / or casting. Furthermore, a liquid-tight carrier medium can be made from plastic. Metal can be easily bent, punched, or pressed.

[0032] At least one carrier medium can consist exclusively of plastic. Alternatively or additionally, at least one carrier medium can consist of a material mixture, in particular a composite material.

[0033] Alternatively or additionally, at least one carrier medium may advantageously consist of a different type of material or a mixture of materials, in particular metal, carbon fiber material or the like, or at least have such materials or mixtures of materials.

[0034] In a further advantageous embodiment, the at least one carrier medium can extend at least partially circumferentially with respect to an imaginary axis. In this way, the liquid purification element can be implemented in a space-saving manner with a correspondingly large surface area accessible to and / or through which the liquid can flow.

[0035] Advantageously, at least one of the support media can be adapted, at least partially, to an imaginary, nearly hollow cylindrical shape. In this way, a favorable ratio between space requirements and surface area can be achieved.

[0036] Advantageously, the at least one carrier medium can be open on one side circumferentially with respect to the imaginary axis. In this way, a space surrounded by the at least one carrier medium, in particular the liquid purification element, can be accessible from the outside.

[0037] In a further advantageous embodiment, the at least one cleaning medium and the at least one carrier medium can be connected to each other at least by means of a material-bonded connection. Material-bonded connections have the advantage that they can also be made liquid-tight.

[0038] Advantageously, the at least one cleaning medium and the at least one carrier medium can be connected to each other by means of a weld, an adhesive bond, a soldered connection, or the like, or a combination of different connections. Alternatively or additionally, at least one positive-locking and / or force-locking connection can also be provided.

[0039] Advantageously, the at least one cleaning medium can be fluid-tightly connected to the at least one carrier medium, at least along its edges. In this way, at least one closed space between the at least one cleaning medium and the at least one carrier medium can be created. After flowing through the at least one cleaning medium, the cleaned liquid can enter this space. Alternatively, with a correspondingly reversed flow direction, the liquid to be cleaned can flow from the space through the cleaning medium into the surroundings of the cleaning element. If the cleaning element, and in particular the cleaning system, is located in a liquid tank, the "surroundings of the cleaning element" refers to the interior of the liquid tank.

[0040] In a further advantageous embodiment, the at least one carrier medium can have a structured surface that faces at least partially towards the at least one cleaning medium. In this way, corresponding spacers can be created by means of the structure to separate the at least one cleaning medium from the corresponding surface of the at least one carrier medium. Thus, at least one space can be created between the at least one carrier medium and the at least one cleaning medium. With corresponding structures on the surface of the at least one carrier medium, fluid-conducting areas can be at least partially delimited. Separate media layers between the at least one carrier medium and the at least one cleaning medium for creating fluid-conducting areas can therefore be dispensed with.Furthermore, by applying at least one cleaning medium directly to at least one carrier medium with the existing structured surface, assembly effort can be reduced.

[0041] Advantageously, the structured surface of at least one carrier medium can form at least one drainage channel, in particular a drainage structure. Liquid can be conveyed through this drainage channel. Overall, thanks to the invention, the separate fabrication and assembly of a separate drainage layer can be dispensed with.

[0042] Advantageously, at least one drainage channel can be implemented on the surface facing the at least one cleaning medium. This allows the liquid to be guided between the at least one carrier medium and the at least one cleaning medium.

[0043] Advantageously, at least one drainage channel can be implemented using cylindrical protrusions, ribs, or a ribbed structure. Ribs can be used to define corresponding elongated areas for directing the fluid.

[0044] In this liquid cleaning system, at least one carrier medium is prefabricated in the final form of the liquid cleaning element before being connected to at least one cleaning medium. This allows the liquid cleaning element to be realized in a mechanically stable and robust manner.

[0045] Advantageously, at least one bracket can have at least one lid part.

[0046] Advantageously, the at least one mounting bracket can have or be connected to at least one pump. The at least one pump can be used to pump, in particular suck or push, the liquid through the liquid cleaning system, in particular the at least one liquid cleaning element.

[0047] Advantageously, the at least one bracket can comprise at least one bracket component with at least one pump, in particular a pump bracket component. In this way, the at least one pump can be integrated into the at least one bracket, in particular the bracket component. The at least one pump can thus be prefabricated and / or assembled together with the at least one bracket, in particular the at least one bracket component.

[0048] Advantageously, the at least one liquid cleaning element can be detachably connected to the at least one holder. In this way, the at least one liquid cleaning element can be removed, and in particular replaced, especially for maintenance purposes.

[0049] Advantageously, the at least one bracket can have several bracket parts, in particular a cover part and / or a pump bracket part, which can be detachably connected to one another. In this way, the bracket parts can be separated from one another for maintenance purposes, in particular for removing or replacing the at least one liquid cleaning element.

[0050] The at least one carrier medium is prefabricated in the final shape of the liquid cleaning element, and the at least one cleaning medium is then connected to the at least one carrier medium. The shape of the liquid cleaning element is determined by the prefabricated at least one carrier medium. The at least one cleaning medium can thus be mechanically stress-free connected to the preformed at least one carrier medium.

[0051] Furthermore, the features and advantages described in connection with the liquid purification element, the liquid purification system, and the method according to the invention, and their respective advantageous embodiments, apply to each other accordingly, and vice versa. The individual features and advantages can, of course, be combined with one another, potentially resulting in further advantageous effects that go beyond the sum of the individual effects. Brief description of the drawings

[0052] Further advantages, features, and details of the invention will become apparent from the following description, in which an embodiment of the invention is explained in more detail with reference to the drawing. The person skilled in the art will expediently consider the features disclosed in the drawing, the description, and the claims individually and combine them into meaningful further combinations. The drawing schematically shows: Fig. 1 a filter with a filter element for urea water solution; Fig. 2. Turn off the filter Fig. 1 in an exploded view; Fig. 3 the filter element from Fig. 1 and Fig. 2 in isometric representation; Fig. 4 the filter element from Fig. 1, Fig. 2 to Fig. 3 in the top view; Fig. 5 the filter element from Fig. 1, Fig. 2, Fig. 3 to Fig. 4 in isometric view looking at the upstream side; Fig. 6 a support part of the filter element made of Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. 5 in isometric view looking at the upstream side; Fig. 7 the support part made of Fig. 6 in front view; Fig. 8 the support part made of Fig. 6 and Fig. 7 in isometric view looking at the outflow side.

[0053] In the figures, identical components are labelled with the same reference symbols. embodiment(s) of the invention

[0054] In Fig. 1 and Fig. Figure 2 shows a filter 10 for urea-water solution in different representations. The filter 10 is typically located in a tank for urea-water solution, which supplies a so-called SCR catalyst for the selective catalytic reduction of nitrogen oxides in exhaust gases. The SCR catalyst is part of the exhaust system of an internal combustion engine, for example, in a motor vehicle.

[0055] The filter 10 includes a holder 12, which holds a filter element 14. The holder 12 comprises a cover part 16 and a pump holder part 18. The filter element 14 is arranged between the cover part 16 and the pump holder part 18.

[0056] The pump mounting part 18 carries a pump, which is not of further interest here, with which the urea water solution can be drawn through the filter 10.

[0057] The lid part 16 and the pump mounting part 18 each have a receiving groove 22 on their facing sides. The receiving grooves 22 each serve to receive a respective edge of the filter element 14. The receiving grooves 22 each extend circumferentially with respect to an imaginary axis 24 of the filter 10.

[0058] Filter element 14 is in Fig. 3 and Fig. Figure 4 shows different perspectives. The filter element 14 generally follows the shape of an imaginary circular cylinder shell coaxial with axis 24. It is therefore curved around its circumference.

[0059] The filter element 14 comprises a carrier medium 26 and a filter medium 28. The filter medium 28 is attached radially outward to the carrier medium 26 with respect to axis 24 by means of welding. The filter element 14 therefore has a bend along its entire length, including the carrier medium 26 and the filter medium 28.

[0060] The carrier medium 26 is manufactured from plastic using an injection molding process. In the injection molding process, the carrier medium 26 is formed in its Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 to Fig. The final shape shown in Figure 7 is manufactured so that no further shaping is required after the injection molding process. The material of the carrier medium 26 is impermeable to liquid. The carrier medium 26 is elastic overall, so that it always returns to its original shape after being subjected to a deforming force.

[0061] On its radially outer circumferential side, the carrier medium 26 has a multitude of circular cylindrical projections, which form a surface structure that acts as a drainage structure 30. The radially outer circumferential side faces the filter medium 28. In the finished filter element 14, the drainage structure 30 is located radially between the carrier medium 26 and the filter medium 28 with respect to axis 24. The drainage structure 30 serves to channel the urea-water solution in a space between the carrier medium 26 and the filter medium 28.

[0062] A suction port 32 is integrally formed on the radially inner circumferential side of the carrier medium 26, on the side facing the pump mounting part 18, with respect to axis 24. The suction port 32 extends radially inward through the carrier medium 26 to the space containing the drainage structure 30. The end of the suction port 32 facing away from the filter medium 28 is designed as a pipe connection. An imaginary axis of the suction port 32 runs radially to axis 24 at this point. In the fully assembled filter 10, the suction port 32 is connected to a corresponding Fig. 2 connected to the connection part 20 of the pump shown.

[0063] With respect to axis 24 in the circumferential direction, a positioning cylinder sleeve 34 is arranged both in front of and behind the suction nozzle 32. The imaginary axes of the positioning cylinder sleeves 34 are aligned parallel to the imaginary axis of the suction nozzle 32. The positioning cylinder sleeves 34 act with corresponding positioning cylinders 36 (in Fig. 2 shown) on the side of the pump mounting part 18 together and serve to position the filter element 14 relative to the mounting 12.

[0064] The filter medium 28 is a filter medium suitable for filtering urea-water solutions, for example, filter fleece or the like. The filter medium 28 is mechanically flexible and adaptable to the curvature of the carrier medium 26. In its raw state, the filter medium 28 is a flat raw material, for example, in lengths of material, which can be cut, punched, or otherwise shaped to the desired form.

[0065] To manufacture the filter 10, the cover part 16 and the pump mounting part 18 are prefabricated as separate parts, for example, using an injection molding process. The carrier medium 26 is manufactured in its final form from plastic using an injection molding process. The drainage structures 30, suction nozzle 32, and positioning cylinder sleeves 34 are molded into the medium.

[0066] The filter medium 28 is cut, punched, or otherwise processed from a suitable raw material. The filter medium 28 is then applied to the carrier medium 26 from the outside and tightly welded to it along the edges. The filter element 14 now has its final shape. Due to the stiffness of the material and the thickness of the carrier medium 26, the filter element 14 can be elastically deformed. However, a permanent deformation of the filter element 14 is not possible without damage.

[0067] The filter element 14 is then inserted into the receiving groove 22 of the pump mounting part 18 and aligned and positioned using the positioning cylinder sleeves 34. The suction nozzle 32 is connected to the corresponding connection part 20 of the pump. The combination of the pump mounting part 18 with the filter element 14 is inserted into the receiving groove 22 of the cover part 16 with the free edge of the filter element 14 leading.

[0068] The filter element 14 is connected to the pump mounting part 18 and the cover part 16 by means of detachable clamp connections. In this way, the filter element 14 can be replaced, for example for maintenance purposes, and the cover part 16 and pump mounting part 18 can be reused.

[0069] During operation of filter 10, the filter medium 28 is surrounded radially outside with urea-water solution with respect to axis 24. A vacuum is created in the space between the carrier medium 26 and the filter medium 28 by the pump. This draws the urea-water solution through the filter medium 24 from radially outside to radially inside into the area of ​​the drainage structure 30 located between the filter medium 24 and the carrier medium 26, where it is purified. The purified urea-water solution is then drawn through the carrier medium 26 via the drainage structure and suction port 32. The pump then conveys the purified urea-water solution through the appropriate line to the SCR catalyst.

Claims

[1] Liquid cleaning element (14) of or for a liquid cleaning system(s) (10), comprising at least one cleaning medium (28) and at least one carrier medium (26), wherein the at least one carrier medium (26) has at least one liquid connection (32) for at least one line for liquid to be cleaned or cleaned, the at least one cleaning medium (28) and the at least one carrier medium (26) are connected to each other, and the liquid cleaning element (14) has at least one bend in at least one section with the at least one cleaning medium (28) and the at least one carrier medium (26), wherein the at least one carrier medium (26) is prefabricated in the final shape of the liquid cleaning element (14) before being connected to the at least one cleaning medium (28), and wherein a liquid connection with a cylindrical suction nozzle (32) is arranged, in particular integrated, on the carrier medium (26). characterized by, that with respect to an axis (24) of the liquid cleaning system (10) viewed in the circumferential direction, a positioning cylinder sleeve (34) is arranged in front of and behind the suction nozzle (32), respectively, for interaction with corresponding positioning cylinders (36) on the side of a pump mounting part (18) of a mounting (12) and for positioning the liquid cleaning element (14) relative to the mounting (12), wherein the imaginary axes of the positioning cylinder sleeves (34) are aligned parallel to an axis of the suction nozzle (32). [2] Liquid purification element according to claim 1, characterized by , that at least one of the carrier media (26) is at most elastically deformable. [3] Liquid purification element according to claim 1 or 2, characterized by , that at least one carrier medium (26) is realized as an injection-molded and / or cast part or bent part, stamped part or pressed part. [4] Liquid purification element according to any of the preceding claims, characterized by , that at least one carrier medium (26) contains or consists of plastic and / or metal. [5] Liquid purification element according to any of the preceding claims, characterized by , that at least one carrier medium (26) extends at least partially circumferentially with respect to an imaginary axis (24). [6] Liquid purification element according to any of the preceding claims, characterized by , that the at least one cleaning medium (28) and the at least one carrier medium (26) are connected to each other at least by means of a materially bonded connection. [7] Liquid purification element according to any of the preceding claims, characterized by , that the at least one carrier medium (26) has a structured surface (30) that is at least partially facing the at least one cleaning medium (28). [8] Liquid cleaning system (10) with at least one liquid cleaning element (14) and at least one holder (12) for the at least one liquid cleaning element (14), wherein the at least one liquid cleaning element (14) comprises at least one cleaning medium (28) and at least one carrier medium (26), wherein the at least one carrier medium (26) comprises at least one liquid connection (32) for at least one line for liquid to be cleaned or cleaned, the at least one cleaning medium (28) and the at least one carrier medium (26) are connected to each other, and the liquid cleaning element (14) has at least one bend in at least one section with the at least one cleaning medium (28) and the at least one carrier medium (26),wherein the at least one carrier medium (26) is prefabricated in the final form of the liquid cleaning element (14) prior to connection with the at least one cleaning medium (28) and wherein a liquid connection with a cylindrical suction nozzle (32) is arranged, in particular integrated, on the carrier medium (26), characterized by , that with respect to an axis (24) of the liquid cleaning system (10) viewed in the circumferential direction, a positioning cylinder sleeve (34) is arranged in front of and behind the suction nozzle (32), respectively, for interaction with corresponding positioning cylinders (36) on the side of a pump mounting part (18) of the mounting (12) and for positioning the liquid cleaning element (14) relative to the mounting (12), wherein the imaginary axes of the positioning cylinder sleeves (34) are aligned parallel to an axis of the suction nozzle (32). [9] Method for manufacturing a liquid cleaning element (14) according to any one of claims 1 to 7, wherein the at least one carrier medium (26) is prefabricated in the final form of the liquid cleaning element (14), wherein the suction nozzle (32) and the positioning cylinder sleeves (34) are integrally formed, and wherein the at least one cleaning medium (28) is subsequently connected to the at least one carrier medium (26).

Images