DE102017006627A1 - Filter assembly with several filter elements - Google Patents

Abstract

The invention relates to a filter assembly (10) for a fluid to be filtered, in particular fuel or oil, with a filter housing (12) comprising: - at least one fluid inlet (22) and at least one fluid outlet (26), - three or more housing parts (16, 17, 18), of which at least one is made in one piece. The filter housing (12) has a plurality of filter pots (14; 14a-14f; 14h-14k) arranged side by side and at least one housing part (16, 18) is for closing the filter pots (14; 14a-14f; 14g-14k) is trained. The fluid inlet (22) and the fluid outlet (26) are located on different housing parts (16, 17, 18). At least two filter elements (30), which are each arranged in one of the filter pots (14; 14a-14f; 14h-14k) of the filter housing (12), each separate a clean room on a clean side (38) of the filter element (30) from an antechamber on a raw side (36) of the filter element (30), wherein between the antechambers of adjacent filter pots (14; 14a-14f; 14h-14k) there is a fluidic connection and the clean spaces of the filter pots (14; 14a-14f; 14h-14k) in open the fluid outlet.

Description

Technical area

The invention relates to a filter assembly for a fluid to be filtered, in particular fuel or oil, with a filter housing and with at least two filter elements.

State of the art

Filter elements are used for example in motor vehicles to free fuels such as fuel or oil from impurities. Typically, exactly one filter element is provided for a fluid to be filtered. The size of the filter element limits a maximum possible volume flow of the fluid to be filtered. However, a space in the necessary size and shape is not always available.

Out EP 0 991 457 81 a filter system has become known in which a plurality of separate, hollow cylindrical filter housing, each with a filter element are screwed to a common filter head. The filter head is designed such that the filter housing with the filter elements can be flowed through in parallel by a fluid. The filter head includes ports for introducing the fluid to be filtered and for discharging the filtered fluid. The purpose of the special filter head is to reduce the number of line connections needed to connect the majority of the filter housings to a conduit for a fluid to be filtered. However, the elaborately designed filter head increases the height in the vertical direction considerably.

US 2011/0 089 101 A 1 discloses a fuel filter in which two parallel-flow, hollow-cylindrical filter cartridges are arranged in a common housing interior of a filter housing, wherein each filter cartridge is surrounded by a fabric of hydrophobic material to separate water contained in the fuel. The filter cartridges are mounted on maintenance covers screwed into the bottom of the filter housing so that the filter cartridges can be easily replaced. Since the filter cartridges are arranged in the common housing interior, compared to the use of a larger filter cartridge, if any, results in only a slight reduction in the size of the entire fuel filter. Also, therefore, no increased flexibility in the design of an outer contour of the filter housing is achieved.

Disclosure of the invention

It is accordingly the object of the invention to provide a filter assembly which can be produced cost-effectively, which makes it possible to accommodate a sufficiently large filter surface for a given volume flow of a fluid to be filtered, even in confined installation spaces.

This object is achieved by a filter assembly for a fluid to be filtered, in particular fuel or oil, with a filter housing, comprising at least one fluid inlet and at least one fluid outlet, three or more housing parts, of which at least one is made in one piece, wherein the filter housing has a plurality of filter pots which are arranged side by side and at least one housing part is designed for closing the filter pots, wherein the fluid inlet and the fluid outlet are present at different housing parts, and at least two filter elements which are each arranged in one of the filter pots of the filter housing, each having a clean room on a clean side of the filter element to separate from a vestibule on a raw side of the filter element, wherein between the antechambers of adjacent filter pots, a fluidic connection and the clean rooms of the filter pots open into the fluid outlet.

Preferred embodiments are given in the dependent claims, the description and the drawing.

It is proposed a filter assembly for a fluid to be filtered, in particular fuel or oil, with a filter housing. The filter assembly comprises: at least one fluid inlet and at least one fluid outlet; three or more housing parts, of which at least one is made in one piece. The filter housing has a plurality of filter pots, which are arranged side by side, and at least one housing part is designed for closing the filter pots. The fluid inlet and the fluid outlet are present on different housing parts. The filter assembly further comprises at least two filter elements, which are each arranged in one of the filter pots of the filter housing, each separating a clean room on a clean side of the filter element from an antechamber on a raw side of the filter element, wherein between the antechambers of adjacent filter pots is a fluidic connection and the clean rooms of the filter pots open into the fluid outlet. The filter pots are preferably arranged side by side side by side, d. H. they touch on at least one outer wall section. However, embodiments are also possible in which there is a distance between two adjacent filter pots.

The at least three-part embodiment of the filter housing allows an advantageous adaptation to available space, especially in a motor vehicle.

The at least one integrally formed housing part is simple and inexpensive to manufacture. In one of the housing parts, at least one fluid inlet is provided for the fluid to be filtered. The housing part is formed with a plurality of filter pots. The filter pots are preferably arranged side by side in a common plane next to each other. The housing part can thus be flexibly adapted to an installation space with complex or fissured geometry, in particular to a very flat installation space. The filter pots can be fluidly connected to one another, for example, via side wall ducts. As a result, a parallel flow through the filter pots can be established. The side wall ducts may be formed as radially extending channels, preferably as slots in the side walls, which are open from a plane of separation of the housing parts, thereby achieving a trouble-free demolding.

The multiple filter pots make it possible to filter a given volume flow of the fluid. The filter housing further comprises a housing upper part for closing the filter pots. The housing top is typically sealing, i. fluid-tight, placed on the filter housing. For this purpose, the filter housing and upper housing part can be firmly connected to each other, for example, glued be. The fluid inlet and the fluid outlet are present on the same housing part, for example on the upper housing part, on the lower housing part, or on a middle part of the housing. For this purpose, at least one fluid collecting line can be formed on the relevant housing part, which has at least one fluid outlet for the filtered fluid flowing out of the filter pots and / or a fluid inlet for the raw fluid to be filtered. Characterized in that the filter assembly comprises at least two filter elements, which are each arranged in one of the filter pots of the filter housing, each of the filter pots is divided into an anteroom for fluid to be filtered on a raw side of the filter element and in a clean space for filtered fluid on a clean silk of the filter element , The at least one fluid manifold for the filtered fluid is typically open to the clean rooms of each filter cup. That is, filtered fluid may flow from the respective clean room into the fluid manifold to the fluid outlet. The at least one fluid distribution line for the fluid to be filtered is typically opened to the antechambers of each filter cup. That is, fluid to be filtered may flow from the fluid inlet into the fluid manifold to the respective vestibule.

It can be provided that the filter assembly in each case has more than one fluid inlet and / or fluid outlet, for example a raw-fluid inlet and an inlet for fuel returned from an internal combustion engine and / or two clean-fluid outlets which can be connected to separate fuel supply systems. The further fluid inlets and / or fluid outlets can be provided on different housing parts. Optionally, the further fluid inlets and / or fluid outlets may be provided on other and / or different housing parts. A raw-side connection and / or clean-side connection of the filter pots is possible via one or more fluid distribution lines and / or one or more fluid manifolds and / or via sidewall bushings.

According to a favorable embodiment, one or more of the housing parts may be formed in one piece or in several parts. In particular, the upper housing part may be formed in one piece or in several parts. It can be designed with one cover element for each filter pot. In the case of a multi-part housing upper part, at least two of the cover elements can be of identical construction.

According to a favorable embodiment, cover elements on an upper housing part of the housing parts may each have a longitudinal segment of at least one fluid collecting line and / or a fluid distribution line. This makes it possible to achieve a compact design.

In a preferred development, it can be provided that the cover element and the respectively assigned longitudinal segment of the at least one fluid collecting line and / or fluid distribution line are formed integrally with one another. The fluid collecting line is then at least partially formed as a part of the upper housing part. As a result, the manufacture and assembly of the filter assembly can be simplified.

According to a favorable embodiment, at least two fluid distribution lines and / or at least two fluid collecting lines may be present on different housing parts. In particular, at least one fluid distribution line may be provided on the lower housing part and at least one on the upper housing part, and / or at least one fluid collecting line may be present on the lower housing part and at least one on the upper housing part. Fluid manifolds and fluid manifolds may be longitudinally split with a bottom portion and a cover portion. Floor section and cover section may be connected to a weld.

According to a favorable embodiment, the housing may be in three parts and the fluid inlet or the fluid outlet may be present on a middle part of the housing which is arranged between the lower part of the housing and the upper part of the housing. This can be beneficial Housing middle part with fluid inlet and fluid outlet be made in one piece. In particular, the housing middle part may in particular be a fluid guide component. The middle part of the housing can identify connecting channels for raw fluid to be filtered and / or filtered clean fluid inside and / or on its outside. Thus, the fluid inlet may be present tangentially outside on the upper housing part and / or on the lower housing part. The fluid distribution line may be located in the interior of the filter assembly and the fluid outlet centrally in the radial direction. Alternatively, the fluid inlet may be present tangentially on the outside of the housing upper part and / or on the housing lower part, and the fluid distribution line may run along the outside of the filter housing of the filter assembly, for example on the upper housing part and / or lower housing part, and the fluid outlet may be located centrally in the radial direction on one of the filter heads.

According to a favorable embodiment, a Gehäusemitteilteil may have the filter pots. Conveniently, the fluid inlet can be provided on the upper housing part or on the lower housing part and the fluid outlet on the lower housing part or on the upper housing part. There may be more than one fluid inlet and / or more than one fluid outlet. A raw-side connection and / or clean-side connection of the filter pots is possible via one or more fluid distribution lines and / or one or more fluid manifolds. The at least one fluid distribution line can be present on the upper housing part and / or lower housing part, and the fluid outlet can be present on a housing part between the upper housing part and the lower housing part. A reverse flow guidance is possible, wherein the fluid inlet and the fluid outlet are interchanged and instead of the fluid distribution line there is a fluid collecting line. Alternatively, the at least one fluid inlet may be provided on the upper housing part and / or the lower housing part, wherein a fluid distribution line may be provided in the interior of the filter module and the fluid outlet may be present on a housing part between the upper housing part and the lower housing part. A reverse flow guidance is possible, wherein the fluid inlet and the fluid outlet are interchanged and instead of the fluid distribution line there is a fluid collecting line. Alternatively, the fluid inlet on one of the outer housing parts, such as the upper housing part, and the fluid outlet on the opposite outer housing part, such as the lower housing part, be present and provided a fluid distribution line in the interior of the filter assembly. The various alternatives allow adaptation to a given space.

According to a favorable embodiment, at least one fluid collecting line and / or at least one fluid distribution line can be designed longitudinally divided. Preferably, a lower-side section of the fluid collecting line is formed by a longitudinal segment, which is formed integrally with a cover element. This further simplifies the production and allows a particularly flat design of the filter assembly.

According to a favorable embodiment, the filter elements can be mounted on a housing upper part of the housing parts. Advantageously, the filter elements are clamped to the upper housing part, embedded or materially secured, preferably welded. Alternatively or additionally, the filter element may be attached to a nozzle section of the housing upper part, preferably attached in a sealing manner. A sealing of the nozzle section can be carried out by an O-ring or sealing seat, which is preferably present at an end plate of the filter element or rests there.

This simplifies the assembly of the filter assembly. The filter elements can be pre-assembled on the upper housing part. At the same time it can be ensured that the filter elements are fluid-tightly connected to the upper housing part, so that no leakage current between the respective antechambers and clean rooms occurs.

In an advantageous embodiment, the filter elements are round elements, in particular with a star-shaped folded filter medium. As a result, the individual filter pots can be made particularly compact. In an alternative, likewise advantageous embodiment, the filter elements are flat elements, in particular with a zigzag-folded filter medium. This allows a very flat construction of the filter assembly.

According to a favorable embodiment, at least two of the filter pots may be connected to one another in a fluid-parallel manner on the raw side. The filter elements in the at least two filter pots can then be flowed through in parallel by the fluid. That is, the vestibules in the filter pots are fluidly connected together. As a result, when using individual small filter elements, a larger effective total filter element can be obtained.

In an advantageous development, it may be provided that in one of the filter pots, preferably in a filter cup which can be flowed through serially, is arranged on the inflow side as the first filter pot of the filter pods of the filter assembly or if a center pot which can be flowed through serially, is a heating element for the fluid and / or a filter element Water separator is arranged for the separation of water contained in the fluid / are. The serially flow-through filter pot is thus upstream or downstream of the other filter pots.

This allows the integration of additional functions such as heating the fluid and / or Separating water from the fluid. The facilities required for this have to be provided only once for the entire filter assembly and not for each filter pot or filter element, ie a total of several times.

According to a favorable embodiment, one or more of the housing parts, in particular a housing lower part, can be designed as an injection molded part. Preferably, one or more of the housing parts, in particular housing lower part and / or an upper housing part and / or a middle part of the housing, consist of polyamide. Most preferably, PA66 is used. The upper housing part is typically also designed as an injection molded part, preferably made of polyamide. Advantageously, one or both or all housing parts can at least partially consist of an electrically conductive plastic, which is advantageous in order to be able to dissipate static electricity which arises due to the flow of fuel. In this case, in a particularly advantageous embodiment, the filter assembly may have at least one connection for electrical contacting for discharging static electricity, which is preferably arranged at the fluid inlet and / or fluid outlet.

According to a favorable embodiment, the filter pots may differ from each other in their respective height and / or diameter. The filter pots are therefore formed differently deep. As a result, the filter assembly can be fitted particularly well in rugged installation spaces.

According to a favorable embodiment it can be provided that at least two of the housing parts, in particular the housing upper part and the housing lower part and / or the housing upper part and the housing middle part and / or the housing lower part and the housing middle part, are fluid-tightly connected to one another at a separation plane, in particular welded together. The separation plane can thereby run normal to a longitudinal axis of the filter pots or extend at an angle to the longitudinal axis of the filter pots. Alternatively, the separation plane may have a stepped, in particular multiply stepped, course, wherein there is preferably at least one separation plane section that is normal to a longitudinal axis of the filter pots and at least one separation plane section that extends at an angle to the longitudinal axis of the filter pots. As a result, an even better adaptation to an installation space is possible, not only in the plane, but also to an inclination of a limitation of the installation space.

A welded seam provided between the housing parts, for example the housing lower part and the housing upper part, is typically designed to be circumferential. The weld can advantageously extend in a seam plane. Alternatively, the weld may extend along a three-dimensional curve. By welding, the housing parts, such as the lower housing part and the upper housing part, in a simple manner, cost-effective, space-saving and safe fluid-tight manner to each other.

Finally, alternatively or additionally, provision can be made for a bracing to be provided between at least two adjacent filter pots, which preferably forms or has at least one fastening device, in particular a fastening lug or fastening lug, for fastening the filter assembly, for example on a motor vehicle, in particular in the underfloor region, can be used.

According to a favorable embodiment, the filter pots can be aligned on at least one end face. This allows a mounting of the filter assembly on a flat mounting surface.

The filter pots may each have a round, elliptical, polygonal, in particular hexagonal or hexagonal, cross-sectional shape. Preferably, all filter pots of the filter assembly have the same cross-sectional shape. Alternatively, however, different cross-sectional shapes can be combined within a filter assembly. By selecting a suitable cross-sectional shape for the filter pots, the filter assembly can be further adapted to the available installation space.

Further advantages of the invention will become apparent from the description and the drawings. According to the invention, the features described above and even further can be used individually for themselves or for a plurality of combinations of any kind.

list of figures

• 1 eine schematische Aufsicht auf eine erste Ausführungsform einer erfindungsgemäßen Filterbaugruppe mit vier in einer Reihe angeordneten, im Wesentlichen zylindrischen Filtertöpfen, bei der tangential jeweils ein Fluideinlass an einem Gehäuseoberteil und an einem Gehäuseunterteil vorgesehen ist mit Fluidverteilerleitungen für Rohfluid an Gehäuseoberteil und an Gehäuseunterteil und an einem Gehäusemittelteil ein Fluidauslass für Reinfluid vorgesehen ist;
• 2 eine schematische Seitenansicht der Filterbaugruppe von 1 mit außenliegenden Fluidverteilerleitungen an Gehäuseunterteil und Gehäuseoberteil und dem Fluidauslass am Gehäusemittelteil;
• 3 eine schematische Aufsicht auf eine Ausführungsform einer erfindungsgemäßen Filterbaugruppe mit vier in einer Reihe angeordneten, im Wesentlichen zylindrischen Filtertöpfen, bei der an einem Gehäuseoberteil und an einem Gehäuseunterteil Fluideinlässe für Rohfluid und an einem Gehäusemittelteil mittig ein Fluidauslass für Reinfluid vorgesehen sind;
• 4 eine schematische Seitenansicht der Filterbaugruppe von 3 mit Fluideinlässen an Gehäuseunterteil und Gehäuseoberteil und dem Fluidauslass am Gehäusemittelteil;
• 5 eine schematische Seitenansicht einer weiteren Ausführungsform einer Filterbaugruppe mit drei Gehäuseteilen, bei der Fluideinlässe und Fluidverteilerleitungen an Gehäuseoberteil und Gehäuseunterteil und ein Fluidauslass in einem Gehäusemittelteil angeordnet sind;
• 6 eine schematische Seitenansicht einer weiteren Ausführungsform einer Filterbaugruppe mit drei Gehäuseteilen, bei der Fluideinlässe an Gehäuseoberteil und Gehäuseunterteil vorgesehen sind, mit einer Fluidverteilerleitung im Inneren der Filterbaugruppe und einem Fluidauslass in einem Gehäusemittelteil;
• 7 eine schematische Seitenansicht einer weiteren Ausführungsform einer Filterbaugruppe mit Fluideinlass und Fluidauslass in einem Gehäuseoberteil und einem Gehäuseunterteil, bei der eine Fluidverteilerleitung im Inneren der Filterbaugruppe verläuft;
• 8 eine perspektivische Ansicht einer weiteren Ausführungsform der erfindungsgemäßen Filterbaugruppe mit Anschlüssen zur elektrischen Kontaktierung;
• 9 eine schematische Aufsicht auf eine weitere Ausführungsform einer erfindungsgemäßen Filterbaugruppe mit sechs im Wesentlichen zylindrischen und unterschiedlich tiefen Filtertöpfen in komplexer Anordnung mit Fluideinlass am Gehäuseunterteil und Fluidauslass am Gehäuseoberteil;
• 10 eine schematische Schnittdarstellung entlang Ebene III-III durch die Filterbaugruppe von 9 mit den unterschiedlich tiefen Filtertöpfen;
• 11 eine Längsschnittansicht eines Filtertopfs mit aufgenommenem Filterelement, das auf einen Stutzenabschnitt des Gehäuseoberteils aufgesteckt ist.
• 12 eine Längsschnittansicht eines Filtertopfs mit aufgenommenem Filterelement, das auf einen Stutzenabschnitt des Gehäuseoberteils aufgesteckt ist.
• 13 eine schematische Seitenansicht einer weiteren Ausführungsform der erfindungsgemäßen Filterbaugruppe mit einer verkippten Trennungsebene der Gehäuseteile;
• 14 eine stark abstrahierte Aufsicht auf eine weitere Ausführungsform einer erfindungsgemäßen Filterbaugruppe mit fünf quaderförmigen Filtertöpfen, die in zwei versetzten Reihen angeordnet sind;
• 15 eine abstrahierte Aufsicht auf eine weitere Ausführungsform einer erfindungsgemäßen Filterbaugruppe mit vier im Querschnitt sechseckigen Filtertöpfen, die gegeneinander versetzt angeordnet sind;
• 16 eine abstrahierte Aufsicht auf eine weitere Ausführungsform einer erfindungsgemäßen Filterbaugruppe mit fünf zylindrischen Filtertöpfen, von denen einer als ein seriell zu den anderen durchströmbarer Mitteltopf mit einem Wasserabscheider und einem Heizelement ausgebildet ist.

In the drawing show:

• 1 a schematic plan view of a first embodiment of a filter assembly according to the invention with four arranged in a row, substantially cylindrical filter pots, wherein tangentially one fluid inlet to an upper housing part and a lower housing part is provided with fluid distribution lines for raw fluid to the upper housing part and lower housing part and a middle part a fluid outlet is provided for clean fluid;
• 2 a schematic side view of the filter assembly of 1 with external fluid distribution lines to lower housing part and Upper housing part and the fluid outlet on the middle part of the housing;
• 3 a schematic plan view of an embodiment of a filter assembly according to the invention with four arranged in a row, substantially cylindrical filter pots, in which on a housing upper part and on a lower housing part fluid inlets for raw fluid and on a central housing part center a fluid outlet for clean fluid are provided;
• 4 a schematic side view of the filter assembly of 3 with fluid inlets on the lower housing part and the upper housing part and the fluid outlet on the middle part of the housing;
• 5 a schematic side view of another embodiment of a filter assembly with three housing parts, are arranged in the fluid inlets and fluid distribution lines to the housing upper part and lower housing part and a fluid outlet in a middle part of the housing;
• 6 a schematic side view of another embodiment of a filter assembly with three housing parts, in which fluid inlets are provided on the upper housing part and lower housing part, with a fluid distribution line in the interior of the filter assembly and a fluid outlet in a housing middle part;
• 7 a schematic side view of another embodiment of a filter assembly with fluid inlet and fluid outlet in an upper housing part and a lower housing part, in which a fluid distribution line runs in the interior of the filter assembly;
• 8th a perspective view of another embodiment of the filter assembly according to the invention with terminals for electrical contacting;
• 9 a schematic plan view of another embodiment of a filter assembly according to the invention with six substantially cylindrical and different depth filter pots in a complex arrangement with fluid inlet on the housing bottom and fluid outlet on the housing top;
• 10 a schematic sectional view along plane III-III through the filter assembly of 9 with the different depth filter pots;
• 11 a longitudinal sectional view of a filter pot with received filter element, which is plugged onto a nozzle portion of the upper housing part.
• 12 a longitudinal sectional view of a filter pot with received filter element, which is plugged onto a nozzle portion of the upper housing part.
• 13 a schematic side view of another embodiment of the filter assembly according to the invention with a tilted separation plane of the housing parts;
• 14 a highly abstracted view of another embodiment of a filter assembly according to the invention with five cuboid filter pots, which are arranged in two staggered rows;
• 15 an abstracted view of another embodiment of a filter assembly according to the invention with four cross-section hexagonal filter pots, which are arranged offset from each other;
• 16 an abstracted view of another embodiment of a filter assembly according to the invention with five cylindrical filter pots, one of which is designed as a serial to the other medium through-flow-through with a water separator and a heating element.

Embodiment (s) of the invention

In the figures, the same or similar components are numbered with the same reference numerals. The figures are merely examples and are not intended to be limiting.

1 to 2 show in various views a first embodiment of a filter assembly according to the invention 10 , 1 shows a schematic plan view of the filter assembly 10 , 2 shows a schematic side view.

A filter housing 12 the filter assembly 10 exemplifies four substantially cylindrical filter pots 14 , The filter pots 14 are arranged side by side along a straight line. The filter pots 14 are here so arranged side by side lying side walls of adjacent filter pots 14 merge. The filter housing 12 comprises at least three housing parts 16 . 17 . 18 , In particular, a lower housing part 16 , a middle part of the housing 17 and an upper housing part 18 , The middle parts of the housing 17 the filter pots 14 the filter assembly 10 lie in a common plane.

The lower housing part 16 , the middle part of the housing 17 and housing top 18 are each integrally formed as ever an injection molded part. The housing parts 16 . 17 . 18 For example, they can be made of polyamide. The upper housing part 18 is on the middle part of the housing 17 and the middle part of the housing 17 on the lower housing part 16 welded fluid-tight. The upper housing part 18 makes four cover elements 20 for the four filter pots 14 out. Each of the lid elements 20 covers the respectively assigned filter pot 14 Completely. In the 1 and 2 left illustrated filter pots 14 have a greater height than the two right filter pots 14 , where the leftmost filter pot 14 smaller than the other and the two right filter pots 14 have the same height. The filter pots 14 extend in the axial direction symmetrically to a center line of the middle part of the housing 17 ,

The filter assembly 10 has two fluid inlets 22 on. One of the fluid inlets 22 is on the upper housing part 18 , the other on the housing base 16 arranged. The fluid inlets 22 are approximately tangential to the corresponding housing part 16 . 18 intended. Through the fluid inlet 22 can filter fluid into the filter pots 14 stream. The filter assembly 10 also has two fluid distribution lines 23 on. The one of the fluid distribution lines 23 is laterally on the upper housing part 18 , the other side of the housing lower part 16 educated. The fluid can be inside the filter pots 14 to a fluid outlet 26 in the middle part of the housing 17 reach. Through the fluid outlet 26 can filtered fluid from the filter housing 12 flow away.

In each of the filter pots 14 is ever a filter element ( 30 . 10 ) arranged. The filter elements can be designed as round elements with a star-shaped folded filter medium and can optionally each comprise a central tube. On the underside, the filter elements can each be closed by a bottom cover, which is connected to the respective central tube, or an end plate in a fluid-tight manner. On the upper side, the filter elements on the upper housing part 18 be held. One of each filter pots 14 is thus subdivided by the respective filter element into a raw-side antechamber for the fluid to be filtered on a raw side of the filter element and a clean space for the filtered fluid on a clean side of the filter element. The filter pots 14 are via the fluid distribution line 23 unilaterally fluidly connected to each other, so that the antechambers in the filter pots 14 through the fluid distribution line 23 can communicate with each other. The filter pots 14 So they are connected in parallel on the raw side. The fluid distribution line 23 is to each of the filter pots 14 opened. Furthermore, there is a fluid connection of each clean room to inside the filter pots 14 for example, via a fluid manifold in the interior. Furthermore, there is a fluidic connection of each vestibule to the fluid distribution line 23 , Consequently, the filter elements 30 can be flowed through in parallel by the fluid to be filtered.

The filter pots 14 can optionally also have side wall ducts in intermediate wall areas 46 the filter pots 14 be fluidly connected to each other, so that the antechambers in the filter pots 14 through the sidewall bushings can communicate with each other.

3 and 4 show a further embodiment of a filter assembly according to the invention 10 with four arranged in a row, essentially cylindrical filter pots 14 , in which on an upper housing part 18 and on a housing lower part 16 a filter housing 12 fluid inlets 22 for raw fluid and on a middle part of the housing 17 in the middle a fluid outlet 26 is intended for pure fluid. 3 shows a schematic plan view of an embodiment of the filter assembly 10 . 4 shows a schematic side view of the filter assembly 10 from 3 , Unlike in the embodiment of 1 and 2 is on the outside of the filter assembly 10 no fluid distribution line provided. Raw fluid occurs from the fluid inlet 22 inside the filter assembly 10 in each case, for example, via side wall openings in intermediate wall areas 46 between the filter pots 14 in the respective vestibule of a filter pot 14 ,

Optionally, in an embodiment not shown, between two adjacent filter pots 14 a strut may be provided which forms a mounting eyelet or mounting hole through which the filter assembly 10 For example, to a motor vehicle, especially in the underbody area, can be mounted.

5 shows a schematic side view of another embodiment of a filter assembly 10 with three housing parts 16 . 17 . 18 , at the fluid inlets 22 and fluid distribution lines 23 each at the upper housing part 16 and housing base 18 and a fluid outlet 26 centered on the middle part of the housing 17 are provided. The fluid passes via an inner fluid manifold to the fluid outlet 26 in the middle part of the housing 17 , Through the fluid outlet 26 can filtered fluid from the filter housing 12 flow away. The fluid distribution line 23 is of longitudinal segments 29 formed, each on one of the cover elements 20 of the upper housing part 18 and corresponding statements of the lower housing part 16 are formed. In the embodiment shown, the longitudinal segments go 29 seamlessly into each other.

The fluid distribution lines 23 are a total of one piece with the upper housing part 18 and the lower housing part 16 educated. In particular, so are the longitudinal segments 29 and the respective lid elements 20 formed integrally with each other. Alternatively, a reverse flow guidance is possible, wherein fluid inlet 22 and fluid outlet 26 are reversed and instead of the fluid distribution line 23 a fluid manifold 24 is present.

6 shows a schematic side view of another embodiment of a filter assembly 10 with three housing parts 16 . 17 . 18 , each with a fluid inlet 22 to housing upper part 18 and housing base 16 is provided, in contrast to the embodiment of 5 no external fluid distribution line is present. A fluid distribution is inside the filter assembly 10 provided, for example, via sidewall openings in intermediate wall areas 46 between adjacent filter pots 14 and / or via an internal fluid distribution line. The fluid outlet 26 is in the middle part of the housing 17 intended. Alternatively, a reverse flow guidance is possible, wherein fluid inlet 22 and fluid outlet 26 are reversed.

7 shows a schematic side view of another embodiment of a filter assembly 10 with a fluid inlet 22 on an outer of the housing parts 16 . 17 . 18 , For example, the upper housing part 18 , and a fluid outlet 26 in another outer of the housing parts 16 . 17 . 18 , For example, the lower housing part 16 , The distribution of the fluid takes place inside the filter assembly 10 via side wall openings in partition wall area 46 adjacent filter pots 14 and / or via a fluid distribution line.

8th shows a perspective view of another embodiment of the filter assembly according to the invention 10 according to, for example, the embodiment of the 7 , At fluid inlet 26 and fluid outlet 22 is one connection each 262 provided for electrical contact. This is advantageous in order to be able to derive static electricity, for example, to a motor vehicle body; These are designed as contact tongues connections 262 electrically connected. Particularly advantageous is an embodiment with electrical contacts, if the housing consists of an electrically conductive plastic, at least in the areas in which the terminals are present, such as a polyamide such as PA66 with GF22 and / or CFS or the like.

9 shows a schematic plan view of a second embodiment of a filter assembly according to the invention 10 with a filter housing 12 , and 10 shows a schematic sectional view along plane III-III in 9 with the different depth filter pots 14 , fluid inlet 22 is on the lower part of the housing 16 and fluid outlet 26 is on the upper part of the housing 18 arranged. The filter assembly 10 here comprises six essentially cylindrical filter pots 14a - 14f , The filter pots 14a - 14f are arranged side by side in a common plane side by side. The five filter pots 14b -14f are arranged here along a bent or angled line. The filter pot 14a is next to this line, adjacent to two of the linearly arranged filter pots 14b . 14c , positioned.

In each of the filter pots 14 is ever a filter element 30 arranged. The filter elements 30 can be designed as round elements with a star-shaped folded filter medium and can continue each comprise a central tube (not shown). On the underside, the filter elements 30 be closed fluid-tight by an unspecified end plate. Upper side, the filter elements 30 on the upper housing part 18 be held. One of each filter pots 14 is from the respective filter element 30 in a raw-sided anteroom for the fluid to be filtered on a raw side 36 of the filter element 30 and a clean room for the filtered fluid on a clean side 38 of the filter element 30 divided. The filter pots 14 are over sidewall bushings 40 in the respective intermediate wall area 46 fluidly connected to each other. That is, the anterooms in the filter pots 14 can through the sidewall bushings 40 communicate with each other. The filter pots 14 So they are connected in parallel on the raw side. The fluid manifold 24 is to each of the filter pots 14 opened. Thus, there is a fluidic connection of each clean room 38 to the fluid manifold 24 , Consequently, the filter elements 30 can be flowed through in parallel by the fluid to be filtered.

As in the schematic sectional view of 10 can be seen, includes the filter housing 12 the filter assembly 10 at least two housing parts 16 . 18 , In particular, a lower housing part 16 and an upper housing part 18 , In the housing lower part 16 are the different depth filter pots here 14a - 14f educated. That means they are filter pots 14a-f with different heights H1 . H2 . H3 intended. In each of the filter pots 14a - 14f is each a filter element 30 arranged. The filter elements 30 are here designed as round elements, which are almost over the entire height H1 . H2 . H3 the respective filter pots 14a - 14f extend. The filter elements 30 In particular, in each case more than 80% of the respective height H1 . H2 . H3 fill out. Each of the filter pots 14a - 14f is about at least the side wall penetration 40 with at least one of the adjacent filter pots 14a - 14f fluidly connected. This can be done from the inlet 22 in the filter housing 12 inflowing, to be filtered fluid in all filter pots 14a - 14f to distribute.

The fluid manifold 24 is on the upper housing part 18 educated. The fluid manifold 24 is executed here longitudinally divided. The fluid manifold 24 therefore includes here a bottom section 24a and a deck section 24b , The bottom section 24a and the deck section 24b borders in a longitudinal seam 42 together. The longitudinal seam 42 is executed here as a weld. Thus, a fluid-tight connection between the bottom portion 24a and the deck section 24b be achieved. The bottom section 24a is integral with the upper housing part 18 educated. outgoing from the bottom section 24a can ever a nozzle section 44 in each of the filter pots 14 extend into it. Through the nozzle sections 44 can filter fluid into the fluid manifold 24 flow. The fluid outlet 26 the fluid manifold 24 is here in one piece with the bottom section 24a or the upper housing part 18 executed.

In 11 and 12 is a detail view of each filter pot 14 shown in longitudinal section, in each case a filter element 30 is included. The upper housing part 18 each has a nozzle section 44 on which the filter element 30 is attached sealingly. In the in 11 shown variant, the seal is made via an O-ring 400 which is in a retracted collar of the end disc 301 of the filter element 30 is included. Alternatively, the seal can also take place without an O-ring, namely through a sealing seat 302 ( 12 ), which is radially inward at the end plate 301 is present, ie the end plate 301 has on its inner circumference a sealing property, for example inherently by the Endscheibenmaterial and / or by a molded-on sealing ring, for example of acrylonitrile-butadiene rubber (NBR). If it is the filter element used 30 around a filter element 30 For example, the center tube with its distal end portion sealingly acts on the nozzle section 44 be plugged.

13 shows a schematic side view of another embodiment of the filter assembly according to the invention 10 with three housing parts 16 . 17 . 18 with a tilted separation plane 70 , on the middle part of the housing 17 and housing base 16 are connected, and at an angle to a normal direction of the filter pots 14 runs. This allows an even better adaptation to an available space, such as in the underbody area of a motor vehicle, take place. The fluid inlet 22 is on the middle part of the housing 17 and the fluid outlet 26 at the lower housing part 16 intended. In the filter pots 14 Available volume as well as possible to use for filtration, the filter element used can be cut obliquely to the longitudinal axis, so that it can have the shape of a cylinder portion.

14 shows a highly abstracted view of a further embodiment of a filter assembly according to the invention 10 , The filter assembly 10 here includes five cuboid filter pots 14 , which are arranged in two offset, parallel rows.

In 15 is an abstracted view of another embodiment of a filter assembly according to the invention 10 shown. The filter assembly 10 here has four cross-section hexagonal (honeycomb) filter pots 14 on. The filter pots 14 are arranged in a zigzag line. Adjacent filter pots 14 border each other flatly. In each of the cross-section hexagonal filter pots 14 Here is one filter element 30 arranged, which is designed as a round element.

16 shows an abstracted view of another embodiment of a filter assembly according to the invention 10 , The filter assembly 10 here includes five cylindrical filter pots 14g - 14k , In each of the filter pots 14h - 14k is each a filter element 30 arranged, which is designed here as a round element. The filter pot 14g is here as a middle pot 50 educated. The middle pot 50 is serial to the filter pots 14h-k flow through. Fluid to be filtered first flows through the middle pot 50 and then through one of the filter pots 14h-k , The filter pots 14h . 14j are doing directly from the as the middle pot 50 trained filter pot 14g fed. The filter pots 14i respectively. 14k are in fluid communication with the filter pots via side wall ducts (not shown) 14h respectively. 14j , In the middle pot 50 For example, a water separator 52 be arranged. The water separator 52 serves to separate in the fluid entrained water from the fluid and in the middle pot 50 withhold. Furthermore, in the middle pot 50 a heating element 54 arranged. With the heating element 54 For example, the fluid may be preheated prior to filtration, for example, to improve flow properties of the fluid.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 099145781 [0003]
• US 2011/0089101 A [0004]

Claims (19)

Filter assembly (10) for a fluid to be filtered, in particular fuel or oil, comprising a filter housing (12) comprising: at least one fluid inlet (22) and at least one fluid outlet (26), - three or more housing parts (16, 17, 18), of which at least one is made in one piece, - wherein the filter housing (12) a plurality of filter pots (14; 14a-14f; 14h-14k) which are arranged side by side and at least one housing part (16, 18) for closing the filter pots (14; 14a-14f; 14g-14k) is trained, - Wherein the fluid inlet (22) and the fluid outlet (26) on different housing parts (16, 17, 18) are present, and - At least two filter elements (30), each in one of the filter pots (14; 14a-14f; 14h-14k) of the filter housing (12) are arranged, each having a clean room on a clean side (38) of the filter element (30) of a Separate antechamber on a raw side (36) of the filter element (30), wherein between the antechambers of adjacent filter pots (14; 14a-14f; 14h-14k) there is a fluidic connection and the clean spaces of the filter pots (14; 14a-14f; 14h-14k) open into the fluid outlet. Filter assembly after Claim 1 , characterized in that one or more of the housing parts (16, 17, 18) are made in one piece or multiple parts, wherein in particular the upper housing part (18) in one piece or in several parts, each with a cover element (20) for each filter cup (14; 14a-14f; 14h-14k) is executed. Filter assembly after Claim 1 or 2 , characterized in that cover elements (20) on an upper housing part (18) of the housing parts (16, 17, 18) each have a longitudinal segment (28, 29) of at least one fluid collecting line (24) and / or a fluid distribution line (23). Filter assembly after Claim 3 , characterized in that the cover element (20) and the respectively associated longitudinal segment (28, 29) of the at least one fluid collecting line (24) and / or fluid distribution line (23) are formed integrally with each other. Filter assembly according to one of the preceding claims, characterized in that at least two fluid distribution lines (23) and / or at least two fluid collecting lines (24) on different housing parts (16, 17, 18), in particular on the lower housing part (16) and upper housing part (18) are present , Filter assembly according to one of the preceding claims, characterized in that the housing (12) is in three parts and the fluid inlet (22) or the fluid outlet (26) on a housing middle part (17), arranged between the housing lower part (16) and housing upper part (18) is, wherein the housing middle part (17) is in particular a fluid guide member. Filter assembly according to one of the preceding claims, characterized in that a Gehäusemitteilteil (17) has the filter pots (14; 14a-14f; 14h-14k). Filter assembly according to one of the preceding claims, characterized in that a fluid distribution line (23) on an outer side (60) of the housing parts (16, 17, 18), in particular on a side wall, is arranged. Filter assembly according to one of the preceding claims, characterized in that at least one fluid collecting line (24) and / or fluid distribution line (23) is designed longitudinally divided. Filter assembly according to one of the preceding claims, characterized in that the filter elements (30) on a housing upper part (18) of the housing parts (16, 17, 18) are supported, in particular wherein the filter elements (30) clamped to the housing upper part (18), embedded or materially secured, preferably welded and / or are attached to a nozzle portion (44) of the upper housing part (18), preferably sealingly attached. Filter assembly according to one of the preceding claims, characterized in that the filter elements (30) are round elements, in particular with a star-shaped folded filter medium, or that the filter elements (30) are flat elements, in particular with a zigzag folded filter medium. Filter assembly according to one of the preceding claims, characterized in that at least two of the filter pots (14; 14a-14f; 14h-14k) are connected to one another in a fluid-parallel manner on the raw side. Filter assembly after Claim 12 , Characterized in that in one of the filter pots (14; 14a-f; 14g-k), preferably in a serial flow-through filter plug (14; 14a-f; 14g-k), which particularly preferably upstream of (the first filter plug of the filter wells 14 14a-14f; 14h-14k) or a flow-through center pot (50), a heating element (54) for the fluid and / or a water separator (52) for separating water contained in the fluid is / are arranged. Filter assembly according to one of the preceding claims, characterized in that at least one of the housing parts (16, 17, 18), in particular a housing lower part (16) and / or an upper housing part (18) and / or a middle part (17), is designed as an injection molded part and preferably consists of polyamide, more preferably at least partially consists of an electrically conductive plastic and / or the filter assembly (10) has at least one connection (262) for electrical contact for discharging static electricity, preferably at the fluid inlet (22) and / or Fluid outlet (26) is arranged. Filter assembly according to one of the preceding claims, characterized in that the filter pots (14; 14a-14f; 14h-14k) differ from each other in their respective overall height (H1, H2, H3) and / or diameter. Filter assembly according to one of the preceding claims, characterized in that at least two of the housing parts (16, 17, 18), in particular housing upper part (18) and lower housing part (16) and / or the upper housing part (18) and the middle part (17) and / or the housing lower part (16) and the housing middle part (17) are fluid-tightly connected to one another at a separation plane, the separation plane extending normal to a longitudinal axis of the filter wells (14; 14a-14f; 14h-14k) or under one Angle to the longitudinal axis of the filter pots (14; 14a-14f; 14h-14k) or - has a stepped, in particular multi-stepped course, wherein preferably at least one separation plane section is present, which is normal to a longitudinal axis of the filter pots (14; 14f; 14h-14k), and at least one separation plane portion extending at an angle to that of the longitudinal axis of the filter wells (14; 14a-14f; 14h-14k). Filter assembly according to one of the preceding claims, characterized in that between at least two adjacent filter pots (14; 14a-14f; 14h-14k) a strut is provided, which preferably at least one fastening device, in particular a fastening lug or fastening tab, forms or has. Filter assembly according to one of the preceding claims, characterized in that the filter pots (14; 14a-14f; 14h-14k) are aligned with one another on at least one end face. Filter assembly according to one of the preceding claims, characterized in that the filter pots (14; 14a-14f; 14h-14k) each have a round, elliptical, polygonal, in particular four- or hexagonal, cross-sectional shape.

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