Patent Application
20190111367
This patent application claims the benefit under 35 U.S.C. § 119 of German Patent Application No. 10 2017 124 251.1, filed Oct. 18, 2017, which application is incorporated herein by reference.
The present invention relates to a filter insert for liquid media. The filter insert comprises essentially a cuboid filter material, which comprises a composite nonwoven layer of several individual nonwoven layers, which are composed of a plurality of endless (continuous) fibers. The endless fibers are interconnected, wherein the plurality of endless fibers of each nonwoven layer are connected in a material-locking manner to a defined degree with other endless fibers. The endless fibers of a nonwoven layer engage in adjacent nonwoven layers and are also connected according to the defined degree with the endless fibers of the adjacent individual nonwoven layers.
Furthermore, the invention relates to a filtration arrangement for liquid media. The filtration arrangement comprises a filter housing having an inlet for the medium to be filtered and an outlet for the filtered medium. A filter insert for the filter housing has substantially a height of the filter housing. The filter insert comprises at least one elastically deformable single element, which is formed from a substantially cuboid filter material. The filter material is composed of a plurality of individual nonwoven layers of a plurality of endless fibers, which are interconnected.
For small and medium sized pools, whirlpools, etc. there are cylindrical filters which are exchanged and disposed of after use or at the end of the life of the filter.
German Patent Application DE 198 06 924 A1 relates to a liquid filter, in particular water filter for swimming pools, swimming pools or the like, in which at least one container is arranged, the container being filled with a loose bed of sand, gravel and/or activated carbon. The container has a water inlet into which the water to be filtered is supplied by means of a pump. The filtered water is returned to the pool via a water outlet. As a container for the filter material, a sack or bag made of a fine-pored fabric is used, its mesh size is smaller than the smallest particle size of the bed.
German Utility Model No. DE 200 10 675 U1 discloses a cartridge filter for swimming pools with interchangeable filter insert. The filter material used can be removed from the filter body and cleaned. A new or cleaned filter fleece can be installed by simply rolling up.
German Patent Application No. DE 11 2009 000 742 T5 also discloses a replaceable filter insert with removal function. The replaceable filter cartridge has a filter medium which is arranged in a zig-zag shape between two end caps.
German Patent No. DE 11 2011 102 094 T5 discloses modular filter elements for use in a filter-in-filter cartridge. There is provided for this purpose an outer filter element and an inner filter element which can be assembled to form a filter cartridge for use in deposition methods and systems. The outer filter element usually functions as a coalescing element, and the inner element usually functions as a particle filter element.
German Utility Model No. DE 20 2011 109 098 U1 discloses a filter for filtering media with a pleated, cylindrical filter element which is arranged between a perforated cylindrical backflow preventer and a perforated cylindrical core. The filter element is arranged in pleated folds with a plurality of pleats having a first pleat height that is greater than the difference between the radius of the backflow preventer and the radius of the core. The pleated folds are directed away from the outer surface of the core and each inclined by a tilt angle with respect to a radial.
German Utility Model No. DE 20 2012 003 179 U1 discloses self-supporting structures with adsorptive properties. The adsorptive structure comprises a plurality of individual adsorber particles. The individual adsorber particles are connected by means of at least one hydrocolloid to form a self-supporting three-dimensional adsorptive structure, in particular an adsorptive shaped body.
German Utility Model No. DE 20 2015 101 238 U1 discloses a filter insert with a plurality of filter networks, each having a plurality of fibers. The fiber networks can be flowed through by a liquid. The fiber networks are arranged in a bag, which itself can be flowed through by liquid.
European Patent No. EP 1 736 049 B1 discloses an internal filter device for aquariums for purifying water. The internal filter device comprises a housing with a housing bottom, a ceiling region and suction openings, wherein a filter element is accommodated in the housing, which has a suction channel for conveying water. The suction channel has a first upper end which can be fluidly connected to a suction device, wherein the housing has a first region having the suction openings for sucking the water from the aquarium, wherein the first region is spatially separated from a second area for receiving the filter element by a substantially vertically extending liquid-tight partition wall.
German Patent No. DE 10 2016 108 558 B3 discloses a filter material for liquid media from a plurality of individual nonwoven fabric layers. Each nonwoven fabric layer comprises a plurality of endless fibers which are interconnected in a material-locking manner to a defined degree with other endless fibers. Likewise, adjacent nonwoven layers are connected to some degree with the adjacent nonwoven layers and thereby form a composite nonwoven layer having a defined top side and bottom side. The filter material of the composite nonwoven layer is cut into geometric filter bodies having the top side and bottom side of the composite nonwoven layer.
German Patent Application No. DE 39 40 264 A1 discloses a multilayer filter material made of nonwoven fabrics. The filter material is made of fibers or filaments of the same or different polymers.
A construction manual for a pond filter can be taken from the website www.teich-filter.eu/teichfilter-aufbau-reihenfolge-filtermedien so that the best possible effect is achieved. The correct order of the filter media and the structure of the pond filter are extremely important. It is crucial which filter media gets into which filter chamber so that the cohesion of the coarse filtering, biological filtering, mechanical filtering and fine filtering can take place at all.
It is an object of the present invention to provide a filter insert that is effective, efficient and reliable in terms of its filtration properties and at the same time cost-effective, easy to change and sustainable.
This object is achieved by a filter insert for a filtration arrangement for filtering liquid media, wherein a cuboid filter material of the filter insert is composed of a composite nonwoven layer of a plurality of individual nonwoven layers of a plurality of endless fibers, which are interconnected, wherein the plurality of endless fibers of each nonwoven layer are interconnected to a defined degree with other endless fibers, and wherein the endless fibers of a nonwoven layer engage in adjacent nonwoven layers and are likewise connected in accordance with the defined degree with the endless fibers of the adjacent individual nonwoven layers, wherein the filter insert comprises at least one elastically deformable single element, wherein the at least one elastically deformable single element is formed from the cuboid filter material, and wherein the at least one elastically deformable single element has an outer diameter which is larger than a diameter of a filter housing, so that the at least one elastically deformable single element rests against an inner wall of the filter housing, the inner wall defining an inner space.
A further object of the invention is to provide a filtration arrangement for liquid media which is effective, reliable, easy to expand, cost effective and sustainable in its use in filtration properties for the liquid medium to be filtered.
This object is achieved by a filtration arrangement for liquid media comprising a filter housing with an inlet for the medium to be filtered and an outlet for the filtered medium, a filter insert for the filter housing, the filter insert having substantially a height of the filter housing and comprising at least one elastically deformable single element, which is formed of a substantially cuboid filter material, wherein the filter material is composed of a plurality of individual nonwoven layers of a plurality of endless fibers, which are interconnected, wherein the at least one elastically deformable single element has an outer diameter which is greater than a diameter of the filter housing, so that the at least one elastically deformable single element rests at least against an inner wall of the filter housing, the inner wall defining an inner space.
The filter insert for liquid media according to the invention comprises at least one elastically deformable single element. The at least one elastically deformable single element is formed from a cuboid filter material. The at least one single element has an outer diameter that is larger than a diameter of a filter housing. This ensures that the at least one elastically deformable single element rests against an inner wall of the filter housing, wherein the inner wall defines an inner space.
A further possible embodiment of the filter insert or of the single element may be that the filter insert has a cylindrical shape.
According to a possible further embodiment, the at least one cylindrical single element may be cut from the elastically deformable filter material along a cutting line. The individual nonwoven layers are aligned perpendicularly to a longitudinal axis of the cylindrical single element.
According to a possible embodiment, the filter insert or the at least one single element can be configured to be tubular. The filter insert or the at least one single element defines an outer surface and an inner surface.
The nonwoven layers are arranged parallel to each other in the cuboid filter material as well as in the operational tubular filter insert or single element. In one possible embodiment of the tubular filter insert or single element, the nonwoven layers run parallel to one another and are arranged substantially concentrically to a longitudinal axis of the tubular filter insert or the tubular single elements.
According to an embodiment of the filter insert, the tubular single elements may comprise at least one cuboid filter material formed into a tube. According to a further possible embodiment, the cuboid filter material, from which the tubular single elements are formed, can be configured such that at least two of the nonwoven layers of the cuboid filter material differ in terms of material density.
According to a possible embodiment, in the production of the tubular single elements, that nonwoven layer with the lower material density is aligned with the jacket of the tubular single element. The nonwoven layer with the greater material density is aligned towards the core of the tubular single element. The nonwoven layers with the different material density can be distinguished with a corresponding color code (such as, for example, coloring of the nonwoven layer). It should be noted at this point that it is not absolutely necessary that the larger weight per unit area (grammage) is attached to the outside of the tubular single element. As described above, the coarser version of the cuboid filter material should be attached to the outside of the single element. A coarse material may well be finer than a higher weight per unit area (grammage) material. This can be adjusted via different material densities and an additional compaction. Thus, a filter material with a weight per unit area (grammage) of 500 grains per square meter can filter coarser than a filter material with a weight per unit area (grammage) of only 300 grams per square meter, but which is more compressed. This results in smaller passages in the filter material despite the lower material density.
According to possible embodiments, the cylindrical or tubular single element can be cut from the cuboid filter material. The nonwoven layers are then substantially perpendicular to a cutting line through the cuboid filter material.
A plurality of tubular single elements can be stacked along a longitudinal axis to form the operational filter insert, since the height of the cylindrical or tubular single elements does not always correspond to the required total height of the operational filter insert.
At least one stabilizing means is provided, so that the cylindrical or tubular single element retains its shape for transport, storage and/or handling. The stabilizing means may have various configurations. Mixed forms of the stabilizing means can also be used for the stabilization of the cylindrical or tubular single element.
The filter insert may also include a bag configured to conform to the shape of the cylindrical single element. The bag is made of a net-like (mesh-like, reticular) material permeable to the medium to be filtered. The bag is formed closeable. According to a possible embodiment, a zipper is provided for closing.
The bag may also be made of the filter material having the plurality of adjacent individual nonwoven layers. The closeable bag can be filled with multiple geometric filter bodies.
The endless (continuous) fibers of the filter material are preferably made of polyester. The endless fibers of the filter material are made from 60% to 90% of solid (full) or hollow fibers and from 10% to 40% of melt fibers. The endless fibers may have a round and oval cross-sectional shape. The filter material made of the endless fibers has a weight per unit area (grammage) of 250 g to 1800 g per square meter. It is also conceivable that the weight per unit area (grammage) of the filter material varies from nonwoven layer to nonwoven layer. The endless fibers may have a fiber thickness of about 40 microns.
The filter material according to the invention is advantageous because it allows three-dimensional filtering for the medium to be filtered. This three-dimensional filtering is provided by the fact that the individual endless fibers within each nonwoven layer also extend in all three dimensions. Therefore, the medium to be filtered must travel along a three-dimensional path through the filter material. Thus, a sufficient distance is provided for the filtering of the medium to be filtered in order to effectively filter the particle-loaded medium to be filtered. In addition, the filter material according to the invention can simply be washed out and thus can be used again for reuse for filtering. Likewise, the special design of the filter material for the circulation pump enables a smaller design or the circulating pump can be operated with a lower power, which in turn leads to energy savings.
The filtration arrangement for liquid media according to the invention is characterized in that a filter housing is provided with an inlet for the liquid medium and an outlet for the filtered medium. The filtration arrangement has a filter insert in the filter housing that has substantially a height of the filter housing. The filter insert comprises at least one elastically deformable single element, which is formed from a substantially cuboid filter material. The filter material is composed of a plurality of individual nonwoven layers of a plurality of endless fibers which are interconnected. According to the invention, the at least one elastically deformable single element has an outer diameter which is larger than a diameter of the filter housing. As a result, the at least one elastically deformable single element rests at least against an inner wall of the filter housing, wherein the inner wall defines an inner (interior) space.
According to one embodiment of the invention, a receptacle for the filter insert is provided in the filtration arrangement. The receptacle comprises an outer cylindrical wall, which is permeable to the medium to be filtered, and an inner cylindrical wall. An operable tubular filter insert is seated between the outer cylindrical wall and the inner cylindrical wall, wherein the operable tubular filter insert comprises at least one tubular single element and substantially has a height of the receptacle.
According to a possible embodiment, the filter insert may comprise at least one cylindrical single element.
According to a possible embodiment, the at least one cylindrical single element may be surrounded by a bag which has the shape of the cylindrical single element. The bag is made of a net-like material permeable to the medium to be filtered, and the bag is formed closeable.
According to a possible embodiment, the filter insert may comprise a permeable bag of net-like (reticulated) material for the medium to be filtered. A plurality of geometric filter bodies cut from the filter material can be filled into the bag. The bag is closeable after filling.
The filled bag may be shapeable such that it rests against the inner wall of the filter housing, the inner wall defining the interior space.
The cylindrical or tubular filter insert provides three-dimensional filtering for the medium to be filtered. This three-dimensional filter property is achieved by the three-dimensional arrangement of the individual endless fibers in the individual nonwoven layers. The endless fibers may have a round and/or oval cross-sectional shape. The filter material can have a weight per unit area (grammage) of 250 g to 1800 g per square meter. The weight per unit area (grammage) may vary within the cuboid filter material.
A further embodiment of the filtration arrangement according to the invention is that the tubular filter insert is seated in the filtration arrangement. The tubular filter insert is configured such that the filter insert is surrounded by an outer cylindrical stabilization means and an inner cylindrical stabilization means. The outer cylindrical stabilization means has formed a plurality of passages, so that the medium to be filtered can reach the filter material of the filter insert. The inner cylindrical stabilization means has formed a plurality of passages, so that the filtered liquid medium can pass out of the filtration arrangement. In this embodiment of the filtration arrangement, the outer cylindrical stabilization means corresponds to an outer cylindrical wall of the receptacle, and the inner cylindrical stabilization means corresponds to the inner cylindrical wall of the receptacle.
A further possibility of the configuration of the filtration arrangement is that the filter insert is inserted directly into the filter housing of the filtration arrangement. The filter insert is shapeable or configured such that the filter insert rests against an inner wall of the filter housing, wherein the inner wall defines an interior space. The filter insert for the medium to be filtered is positioned between the inlet and the outlet. This ensures that the medium to be filtered meets filter material during the filtration process. In this embodiment, the filter insert may comprise at least one cylindrical single element. The at least one cylindrical single element can be surrounded by a bag Which has the shape of the cylindrical single element. The bag is made of a material permeable to the medium to be filtered, and the bag is configured to be closeable.
The filter insert for the filtration arrangement may also comprise a bag made of a material permeable to the medium to be filtered. A plurality of geometric filter bodies cut from the filter material can be filled into the bag. The bag is also configured to be closed after filling. The filled bag may be shaped to abut the inner wall of the filter housing of the filtration arrangement, wherein the inner wall defines the interior space.
The nature and mode of the operation of the present invention will now be more fully described in the following detailed description of the invention taken with the accompanying drawing figures, in which:
For identical or equivalent elements of the invention, identical reference numerals are used. It will be understood by those skilled in the art that the embodiments of the filtration arrangement and the tubular filter body presented in the description are not intended to be limiting of the invention. The size ratios in the figures do not always correspond to the actual size ratios, as some shapes are simplified and other shapes are shown enlarged in relation to other elements for ease of illustration.
As shown in
By dimensioning the outer diameter DA of the filter insert 10, the interior space 35 of the filter housing 31 is filled. Since the filter insert 10 has a larger outer diameter 10A than the diameter 31D of the filter housing 31, the cylindrical filter insert 10, which is also elastically deformable, is in full contact over its entire surface with an inner wall 45 of filter housing 31, the inner wall 45 defining the inner space 35. This has the advantage that the medium 7 to be filtered on the way from the inlet 32 to the outlet 34 must pass exclusively the filter insert 10 and thus the filter material 2. This ensures that effective filtering of the medium 7 to be filtered is carried out. A path of the medium 7 to be filtered past the filter insert 10 is excluded.
In the embodiment shown in
The material for receptacle 15 of tubular filter insert 10 may be, for example, a thermoplastic or a metal. A preferred material for the receptacle 15 may be stainless steel. The passages 8 and 9 for the outer tube 18 and the inner tube 19, respectively, can be introduced by means of laser cutting or punching in the case of stainless steel. The receptacle 15 has a bottom 14 on which the inner tube 19 is seated and thus closed in the direction of the inlet 32. In the direction of the outlet 34, the inner tube 19 is open, so that the filtered medium 7 can be removed from the filtration arrangement 30. The receptacle 15 is closed in the region of the outlet 34 by an annular cover 13, so that the outlet 34 remains free out of the inner tube 19. Through the bottom 14 and the annular cover 13 of the receptacle 15 it is achieved that the medium 7 to be filtered in the filtration arrangement 30 flows through from the outer cylindrical wall 16 from annular filter insert 10 to the inner cylindrical wall 17 and thus provides effective filtering in the tubular filter insert 10.
The bag 60 shown in
The invention has been described with reference to preferred embodiments. It will be understood by those skilled in the art that changes and modifications of the invention may be made without departing from the scope of the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 102017124251.1 | Oct 2017 | DE | national |
