DE102019219375A1 - Filter device and filter element for such a filter device - Google Patents

Abstract

The present invention relates to a filter device (1) for filtering a fluid, with a housing (3) having an installation space (2), with a mounting (4) in the direction of an assembly direction (5) through a mounting recess (6) of the Housing (3) insertable and removable filter element (7) through into the installation space (2) for filtering a fluid, the filter element (7) having a raw fluid space (8) and a clean fluid space (9) from one another when inserted into the installation space (2) separates, wherein during operation of the filter device (1) fluid flows from the raw fluid space (8) through the filter element (7) to the clean room (9), with a cover element (11) which can be mounted on the housing (3) fluid-tight closing of the assembly recess (6), the filter device (1) having a locking arrangement (12) made up of a locking body (13) and a counter locking body (14), the locking body (13) and d he counter locking body (14) can be brought into mutual contacting engagement in order to actuate the locking body (13), which can be elastically moved back and forth between a release position (16) and a locking position (17) in the release position (16) within the scope of a locking movement (15) to enable assembly of the cover element (11) on the housing (3).

Description

The invention relates to a filter device for filtering a fluid according to the preamble of claim 1 and also to a filter element, in particular for use in such a filter device.

Filter devices have long been known and are used, for example, in the field of automotive engineering in air conditioning systems as air filters or cabin filters or in the field of internal combustion engines as intake air filters, oil filters or fuel filters. The filter elements usually arranged in the filter devices serve to filter a raw fluid provided, for example outside air, inside air or a combination of outside and inside air or fuels or lubricants. Filtering means that particles and / or other substances are more or less completely separated out of the raw fluid, so that the raw fluid is made available practically clean and / or pure for downstream processes as a pure fluid.

Because particles and / or substances with a flow resistance-increasing effect gradually accumulate on or in the known filter elements, they are usually arranged interchangeably in a housing of the filter device, which enables the filter element or a filter body of the filter element to be changed regularly. This has the advantage that proper filter function can be guaranteed when the filter device is in operation. To change, the filter element is usually first removed from a housing of the filter device during assembly, so that a reprocessed filter element or, alternatively, a new filter element can then be reinserted into the housing. For this purpose, the housing necessarily has a mounting recess which allows the filter element to be removed or inserted. The mounting recess can be covered by a cover element, so that especially when the filter device is in operation, fluid leakage can be practically completely prevented at this point.

In the DE 10245427 A1 describes a heating and air conditioning device with a replaceable filter element, the filter element being held by a cover of a housing during assembly and disassembly. In order to mount and dismantle the cover on the housing with the filter element, provision is made for the cover to be equipped with latching hooks which are in contact with receptacles on the housing and also on the filter element in order to clamp them to one another.

Also in the documents DE 20 2006 004 420 U1 , DE 20 2005 011 079 , DE 4234047 C1 and EP 2397210 A1 such filter devices with filter element are described.

In the case of the known filter devices, when the filter element is being installed, the actual installation position of the filter element deviating from a specified target installation position of the filter element can lead to not inconsiderable fluid leaks which are desirable to prevent, for example to prevent the contaminative penetration of unfiltered raw fluid into Avoid clean fluid areas. Furthermore, there is a desire to ensure that predetermined and functionally suitable filter elements can only be mounted on the filter device for the respective filter device, in particular by the manufacturer.

The object of the invention is therefore to provide an embodiment of a filter device which is improved in this regard or at least a different embodiment. In particular, the assembly of the filter element, in particular a change of the filter element, is intended to be simplified and at the same time to ensure that only one predetermined and suitable filter element can be mounted on the respective filter device. In particular, the assembly or the presence of a predetermined and suitable filter element should be ensured.

In the present invention, this object is achieved in particular by the subjects of the independent claims. Advantageous embodiments are the subject of the dependent claims and the description.

The basic idea of the invention is to equip a filter device with a locking arrangement that allows a cover element of the filter device covering a mounting recess to be mounted on a housing of the filter device only if a filter element specified by the manufacturer is properly inserted into the housing. To implement it, the filter element is expediently equipped with a counter-locking body and the cover element is expediently equipped with a locking body, or vice versa. In both cases, the locking body can thereby be moved, in a touching manner, through the counter locking body into a release position allowing the assembly of the cover element. If a filter element not specified by the manufacturer is inserted into the housing or a filter element specified by the manufacturer is not properly inserted into the housing, the locking arrangement allows the assembly of the cover element to be locked on the housing, for example because the counter locking body and the locking body are not in contact Intervention come.

Specifically, provision is made to provide a filter device for filtering a fluid with a housing having an installation space. The filter device also has an assembly in the direction of an assembly direction, which can be aligned in particular angular or orthogonal or parallel to the housing or to a mounting recess of the housing or to a flow direction of the fluid or a cover mounting movement of the cover element, through a mounting recess of the housing Removable filter element for filtering a fluid that can be inserted and removed into the installation space, the filter element separating a raw fluid space and a clean fluid space from one another, especially fluid-tight, when it is inserted into the installation space, especially completely. During the operation of the filter device, (raw) fluid flows into the housing of the filter device, in particular through a fluid inlet opening of the housing, specifically into the raw fluid space. From there, the fluid arrives in a direction of flow, especially orthogonal to the filter element, through the filter element to the clean room. After filtering has taken place, the fluid then flows out of the housing, in particular through a fluid outlet opening in the housing. Furthermore, the filter device has a cover element which can be mounted on the housing and which can be arranged on the housing for, in particular fluid-tight and / or complete, closing or covering of the mounting recess, in particular in a contacting and gap-free manner. For example, the cover element can be screwed to the housing or clamped by a suitable clip. The cover element is expediently mounted so that it can be guided relative to the housing in the manner of sliding doors by means of a guide device which can in particular have two longitudinal guide rails arranged opposite one another and arranged on the housing, and thus mating longitudinal guide rails arranged in sliding engagement on the cover element. It is essential that the filter device has a locking arrangement for selectively releasing or locking assembly of the cover element on the housing. The locking arrangement for its part has at least one, in particular elastic, further in particular reversible, deformable locking body and at least one opposing locking body that interacts with the locking body, in particular, is relatively stiff compared to the locking body. In principle, only a single counter locking body and several locking bodies can be provided. The locking body can be moved back and forth, in particular elastically, further in particular reversibly, in particular by the counter locking body, as part of a locking movement between a release position that enables assembly of the cover element on the housing and at least one lock position that locks assembly of the cover element on the housing . In order to either enable or disable the assembly of the cover element on the housing, the blocking body and the counter blocking body can be brought into mutual contacting engagement, whereby the blocking body can be actuated either in the release position or in the blocking position during the assembly of the cover element. In the release position, assembly of the cover element on the housing is released and the locking body is expediently tensioned in the release position by contacting the opposing locking body, in particular elastically. In the blocking position, the blocking body and the counter blocking body are out of engagement, especially in contact. In the blocking position, the blocking body prevents the cover element from being mounted on the housing, in particular without being elastically tensioned. The blocking body expediently automatically returns to the blocking position from the release position. The blocking body can be arranged on the filter element or on the cover element. The counter-locking body can be arranged on the filter element or on the cover element. This advantageously ensures that filter devices or filter elements equipped without a counter locking body and / or locking body cannot be completely covered by the cover element, so to speak like a foreign filter installation lock. Furthermore, in particular by the manufacturer, predetermined filter elements which are not properly inserted into the installation space cannot be completely covered by the cover element, so to speak a wrong installation safeguard. The filter device, especially one that is not equipped at all or is incorrectly equipped, cannot be put into operation.

It is useful if the blocking body of the filter device is a rod-shaped or bar-shaped lever body. The lever body can have a lever base and a lever member connected to it in a materially bonded manner, in particular integrally, i.e. in one piece, and forming a free lever body end.

More expediently, in the release position and as soon as the cover element is completely mounted on the housing, the blocking body can engage at least in sections in a blocking body receptacle arranged on the housing or on the cover element. The free end of the lever body of the lever body of the locking body is preferably in contact with the locking body receptacle, in particular without a gap.

The locking body can have a consistently constant two-dimensional locking body cross-section in the direction of its main extent, in particular along the lever member.

Furthermore, the blocking body can be made of a plastic material, metal material or composite material or nonwoven material, which can expediently have elastic material properties.

The counter-locking body is expediently formed from a ramp body which is equipped with a predetermined or predeterminable ramp. The ramp realizes, so to speak, an inclined plane on which a locking body can slide along in a touching manner as part of the locking movement in order to be switched back and forth between the release position and the locked position.

A ramp slope angle characterizing the ramp is expediently defined between the ramp and a planar base surface of the ramp body or a large surface of the ramp body or a large surface of the filter element. The ramp angle can be in the range between 1 ° and 45 °, in particular 10 °, 15 °, 20 °, 25 °, 30 °, 35 °, 40 °, 45 °. A ramp slope angle of 45 ° is expediently preferred because it has been recognized that the locking body can be guided along the ramp at this angle with relatively little frictional resistance, in particular with little effort.

The ramp of the ramp body preferably forms at least one, in particular flat, release ramp section and at least one different, in particular separate or separate, especially flat, blocking ramp section. For example, the release ramp section and the blocking ramp section can curve or merge into one another in an arc shape. In principle, the lever member of the lever body of the locking body can be in contact with the ramp during the assembly of the cover element on the housing, namely either in contact with the release ramp section or in contact with the locking ramp section, the locking body then taking up either one of the locking positions or the release position. As part of the assembly of the cover element on the housing, the lever member can optionally slide back and forth between the blocking ramp section and the release ramp section in a contacting manner. When sliding from the locking ramp section into the release ramp section, the lever element of the locking body gradually moves into the release position, in particular with elastic deformation. When sliding from the release ramp section into the blocking ramp section, the lever member of the blocking body moves into the blocking position, in particular with elastic recovery.

In particular, the blocking body can be moved back and forth between the release position and the blocking position during assembly by means of the counter blocking body in the direction of the assembly direction, and thereby in particular moved into the release position. The locking movement is therefore parallel to the assembly direction. However, one can also imagine locking movements of the locking body oriented at an angle to the assembly direction. In particular, the locking movement of the locking body is a rotary and / or translational rotary movement, the pivot point of which is defined by the lever base of the lever member of the locking body.

Further expediently, the blocking body can be moved back and forth between the release position and the blocking position by means of the counter blocking body by means of the counter blocking body, and especially moved into the release position, transversely or essentially transversely to the assembly direction.

It is preferably provided that the locking body, in particular integrally, is arranged on the cover element. Alternatively, the lever base of the locking body can be arranged, in particular integrally or cohesively, on the cover element. As a further alternative, the blocking body can be arranged on the filter element, in particular integrally or cohesively. Furthermore, the lever base of the locking body can be arranged on the filter element, in particular integrally or cohesively. In this way, favorable arrangement options for the blocking body on the filter element or on the cover element are described in each case, which in particular promote favorable and rapid production of the filter device.

Furthermore, the filter device can have a counter-blocking body which is formed directly by the filter element. In this case, one can also say that the filter element is a counter-blocking body. Furthermore, the counter-blocking body can be formed by a side strip of the filter element, especially one that is glued to the filter element. Alternatively, the counter-blocking body, in particular cohesively or integrally, can be arranged on the filter element, for example if the counter-blocking body is provided as a separate component. As a further alternative, the counter-blocking body can be arranged on a side strip of the filter element, in particular cohesively or integrally, for example if the counter-blocking body is provided as a separate component. As a further alternative, the counter-locking body can be arranged on the cover element, in particular in a materially bonded or integral manner.

As a result, favorable options for arranging the counter-locking body on the filter element or on the cover element are provided, which in particular promote an inexpensive and rapid manufacture of the filter device. Above all, the option of forming the counter-blocking body directly by the filter element or by a side strip of the filter element has a monetary incentive with regard to production.

It is possible for the filter element to have a fluid inflow surface oriented against the flow direction upstream of the raw fluid space and a fluid outflow surface oriented with the flow direction downstream. The The blocking body or the lever base of the blocking body, in particular integrally or cohesively, can be arranged on a circumferential filter jacket surface of the filter element that connects the fluid inflow surface and the fluid outflow surface to one another.

The blocking body or the lever member of the blocking body are each preferably oriented transversely or essentially transversely with respect to the fluid inflow surface and / or the fluid outflow surface. The blocking body or the lever member of the blocking body are expediently oriented transversely or essentially transversely along their respective main direction of expansion or their respective longitudinal axis with respect to the fluid inflow surface and / or the fluid outflow surface.

The blocking body or the lever member of the blocking body can each be oriented parallel or essentially parallel with respect to the fluid inflow surface and / or the fluid outflow surface. The blocking body or the lever member of the blocking body are expediently oriented parallel or essentially parallel along their respective main direction of expansion or their respective longitudinal axis with respect to the fluid inflow surface and / or the fluid outflow surface.

The cover element is expediently a flat body with at least two oppositely oriented, in particular planar, large surfaces and, in particular planar and / or angled or parallel, narrow surfaces, in particular one-piece, flat body. The flat body can define a main cover axis and a transverse cover axis, wherein it extends lengthways in the direction of the main cover axis and widthways transversely thereto, in the direction of the transverse cover axis. In terms of height, so to speak in the direction of a high cover axis oriented transversely to the main cover axis and transversely to the transverse cover axis, the flat body is comparatively relatively high, which, so to speak, describes the thickness of the cover element.

Preferably, the locking body or the lever member of the locking body can be oriented transversely or essentially transversely or parallel with respect to the main cover axis and / or, in particular cohesively or integrally, be arranged on a large area of the flat body of the cover element. This provides a possible and, in particular, cost-effective structural solution.

In particular, two separate, in particular tab-like, locking bodies touching, in particular integrally, can be arranged on the cover element. Each locking body can protrude from a large area of the cover element. The locking bodies can each interact with a ramp body assigned to them and arranged on the filter element, in particular with its ramp, in order to implement a locking movement, that is, a movement between a locking position and a release position. The cover element can only be properly mounted on the housing of the filter device when both locking bodies are moved into the respective release position. The blocking bodies can expediently interact in a touching manner with the respective ramp body, in particular with its ramp. When the cover element is mounted on the housing, the two locking bodies move away from one another, in particular due to elastic deformation.

In order to releasably fix and lock the cover element on the housing, a slide which can be moved back and forth between a closed position and an open position can be arranged on the housing. The cover element can be clamped to the housing and / or to the filter element by means of the slide. It is expediently provided that a pocket-like slide guide groove for receiving the slide is arranged on the cover element or on the filter element or on the housing. The slide guide groove can penetrate the respective component, especially completely. The slide guide groove can preferably be implemented as an elongated longitudinal groove, with a guide surface arrangement serving to guide the slide being formed on the inside of the groove. The slide guide groove also forms a slide stop on two opposing guide surfaces, in particular inner end faces. The slide can be placed touching the slide stops. The open position and the closed position are expediently defined by the two slide stops. Furthermore, the slide can reach through the slide guide groove in the closed position in order to interact with the locking body of the locking arrangement and / or the cover element and / or the filter element and / or the housing in a contacting, in particular clamping manner.

The slide guide groove for guiding the slide can expediently comprise a guide surface or a guide surface arrangement on which the slide rests in a touching manner. Alternatively, it can be provided that the slide has a cylinder shaft body that is round or prismatic or elliptical in cross section and a handle part integrally adjoining it on the head side. Furthermore, the slide can be actuated back and forth between the closed position and the open position, expediently manually by hand, by means of the handle part.

The invention comprises the alternative or additional further basic idea of specifying a filter element, in particular for use in a filter device.

For this purpose, a filter element is provided which has a filter body having a circumferential filter jacket surface, in particular a pleated flat filter body. In any case, the filter element or the filter body is used to filter a fluid. The filter jacket surface connects an upstream-oriented fluid inflow surface of the filter body and a downstream-oriented fluid outflow surface of the filter body. Furthermore, at least one blocking body according to the above description is arranged on the filter jacket surface. In particular, the locking body has a lever base and a rod-shaped or bar-shaped lever member which adjoins it, in particular cohesively and integrally, and forms a free lever body end. At least the lever member is oriented parallel, transversely or essentially transversely to the fluid inflow surface and / or to the fluid outflow surface. Instead of the blocking body, a counter blocking body, in particular as described above, can be provided, so to speak as a constructive reversal solution.

In summary, it remains to be stated: The present invention preferably relates to a filter device for filtering a fluid, with a housing having an installation space, with a filter element for filtering a fluid that can be inserted and removed during assembly in the direction of an assembly direction through a mounting recess of the housing into the installation space , the filter element separating a raw fluid chamber and a clean fluid chamber from one another when the filter element is inserted into the installation chamber, with fluid flowing from the raw fluid chamber through the filter element to the clean room during operation of the filter device, with a cover element that can be mounted on the housing for the fluid-tight closing of the assembly recess, wherein the filter device has a locking arrangement of a locking body and a counter locking body, the locking body and the counter locking body in mutual contacting engagement br are ingbar to actuate the blocking body, which can be moved elastically back and forth between a release position and a blocking position, into the release position in order to enable the cover element to be mounted on the housing.

Further important features and advantages of the invention emerge from the subclaims, from the drawings and from the associated description of the figures on the basis of the drawings.

It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively specified combination, but also in other combinations or on their own, without departing from the scope of the present invention.

Preferred exemplary embodiments of the invention are shown in the drawings and are explained in more detail in the following description, with the same reference symbols referring to the same or similar or functionally identical components.

• 1 eine perspektivische Ansicht eines bevorzugten Ausführungsbeispiels einer Filtereinrichtung, wobei innerhalb eines mit gestrichelten Linien angedeuteten Gehäuses der Filtereinrichtung ein Filterelement zum Filtrieren eines Fluids angeordnet ist, und wobei eine das Gehäuse vollständig durchsetzende Montageausnehmung des Gehäuses vollständig von einem Deckelelement verschlossen ist,
• 2 in einer perspektivischen Ansicht einen vergrößerten Ausschnitt der Filtereinrichtung aus 1 gemäß einem dort eingetragenen Pfeil II,
• 3 in einer perspektivischen Ansicht einen weiteren vergrößerten Ausschnitt der Filtereinrichtung aus 1 gemäß einem dort eingetragenen Pfeil III,
• 4 in einer perspektivischen Ansicht das Deckelelement der Filtereinrichtung aus 1,
• 5 in einer perspektivischen Ansicht das Filterelement der Filtereinrichtung aus 1,
• 6 in einer Draufsicht die Filtereinrichtung aus 1 gemäß einem dort eingetragenen Pfeil VI, wobei das Gehäuse der Filtereinrichtung weggelassen ist, um die Erkennbarkeit des Filterelements und des Deckelelements zu begünstigen,
• 7 in einer weiteren Draufsicht die Filtereinrichtung aus 1 gemäß einem dort eingetragenen Pfeil VII, wobei erneut das Gehäuse der Filtereinrichtung weggelassen ist, um die Erkennbarkeit zu begünstigen, weiterhin ist das Filterelement aus dem Gehäuse entfernt,
• 8 eine perspektivische Ansicht eines weiteren bevorzugten Ausführungsbeispiels einer Filtereinrichtung, wobei innerhalb eines mit gestrichelten Linien angedeuteten Gehäuses der Filtereinrichtung ein Filterelement angeordnet ist und eine Montageausnehmung des Gehäuses mit einem Deckelelement teilweise verschlossen ist,
• 9 in einer perspektivischen Ansicht das Deckelelement der Filtereinrichtung nach 8,
• 10 eine perspektivische Ansicht eines weiteren bevorzugten Ausführungsbeispiels einer Filtereinrichtung, wobei innerhalb eines mit gestrichelten Linien angedeuteten Gehäuses der Filtereinrichtung ein Filterelement angeordnet ist, ein zum Verschließen einer Montageausnehmung des Gehäuses dienendes Deckelelement ist nicht illustriert,
• 11 in einer perspektivischen Ansicht nun das Deckelelement der Filtereinrichtung aus 10,
• 12 eine perspektivische Ansicht eines weiteren bevorzugten Ausführungsbeispiels einer Filtereinrichtung, wobei innerhalb eines mit gestrichelten Linien angedeuteten Gehäuses der Filtereinrichtung ein Filterelement angeordnet ist und wobei eine Montageausnehmung des Gehäuses durch ein Deckelelement teilweise verschlossen ist,
• 13 in einer perspektivischen Ansicht das Deckelelement der Filtereinrichtung aus 12,
• 14 eine Draufsicht eines weiteren bevorzugten Ausführungsbeispiels einer Filtereinrichtung, wobei ein Gehäuse der Filtereinrichtung weggelassen ist, um den Blick auf ein innerhalb des Gehäuses angeordnetes Filterelement sowie ein daran angeordnetes Deckelelement zum Verschließen einer Montageausnehmung des Gehäuses freizugeben,
• 15 in einer Draufsicht einen vergrößerten Ausschnitt der Filtereinrichtung aus 14 gemäß einem dort eingetragenen Pfeil XV,
• 16 in einer perspektivischen Ansicht das Filterelement der Filtereinrichtung aus 14,
• 17 in einer perspektivischen Ansicht das Deckelelement der Filtereinrichtung aus 14,
• 18 in einer perspektivischen Ansicht eines bevorzugten Ausführungsbeispiels einer Filtereinrichtung einen an der Filtereinrichtung angeordneten wahlweise zwischen einer Schließstellung und einer Offenstellung hin und her verschiebbarer Schieber, der zum Fixieren und Verriegeln eines Deckelelements der Filtereinrichtung an einem Gehäuse der Filtereinrichtung in die Schließstellung bewegt ist, und zuletzt die
• 19 in einer perspektivischen Ansicht die Filtereinrichtung mit Schieber gemäß 18, allerdings ist der Schieber nun in die das Deckelelement freigebende Offenstellung bewegt.

It show, each schematically

• 1 a perspective view of a preferred embodiment of a filter device, wherein a filter element for filtering a fluid is arranged within a housing of the filter device indicated by dashed lines, and wherein a mounting recess of the housing that completely penetrates the housing is completely closed by a cover element,
• 2 in a perspective view of an enlarged section of the filter device 1 according to an arrow II entered there,
• 3 in a perspective view of a further enlarged section of the filter device 1 according to an arrow III entered there,
• 4th in a perspective view of the cover element of the filter device 1 ,
• 5 in a perspective view of the filter element of the filter device 1 ,
• 6th in a plan view of the filter device 1 according to an arrow VI entered there, the housing of the filter device being omitted in order to facilitate the visibility of the filter element and the cover element,
• 7th in a further plan view of the filter device 1 according to an arrow VII entered there, the housing of the filter device again being omitted in order to make it easier to see, the filter element has also been removed from the housing,
• 8th a perspective view of a further preferred embodiment of a filter device, wherein a filter element is arranged within a housing of the filter device indicated by dashed lines and a mounting recess of the housing is partially closed with a cover element,
• 9 in a perspective view the cover element of the filter device according to 8th ,
• 10 a perspective view of a further preferred embodiment of a filter device, wherein within a housing indicated by dashed lines Filter device, a filter element is arranged, a cover element serving to close a mounting recess of the housing is not illustrated,
• 11 in a perspective view now the cover element of the filter device 10 ,
• 12th a perspective view of a further preferred embodiment of a filter device, wherein a filter element is arranged within a housing of the filter device indicated by dashed lines and wherein a mounting recess of the housing is partially closed by a cover element,
• 13th in a perspective view of the cover element of the filter device 12th ,
• 14th a top view of a further preferred embodiment of a filter device, wherein a housing of the filter device is omitted in order to reveal a view of a filter element arranged within the housing and a cover element arranged thereon for closing a mounting recess of the housing,
• 15th in a plan view from an enlarged section of the filter device 14th according to an arrow XV entered there,
• 16 in a perspective view of the filter element of the filter device 14th ,
• 17th in a perspective view of the cover element of the filter device 14th ,
• 18th in a perspective view of a preferred exemplary embodiment of a filter device, a slide which is arranged on the filter device and can be moved back and forth between a closed position and an open position and which is moved into the closed position to fix and lock a cover element of the filter device on a housing of the filter device, and finally the
• 19th in a perspective view the filter device with slide according to FIG 18th , however, the slide is now moved into the open position releasing the cover element.

The painting 1 to 19th show preferred exemplary embodiments of a filter device 1 , wherein each exemplary embodiment carries the basic idea of the invention on its own. For the sake of simplicity, functionally identical or functionally similar components are provided with the same reference symbols in the exemplary embodiments, so that a new description of functionally identical or functionally similar components is dispensed with in order to avoid repetitions.

The 1 shows in a perspective view a preferred embodiment of a filter device serving to filter a fluid 1 . She's with one in the 1 housing indicated only by dotted lines 3 equipped, the one with the reference number 2 designated installation space forms or limits. In the 1 is still a with the reference number 7th Labeled filter element of the filter device 1 to recognize that the actual filtering of the fluid during the operation of the filter device 1 realized. The filter element 7th can be part of an assembly 4th heading towards one in the 1 assembly direction indicated by a double arrow 5 takes place through a the housing 3 , especially complete, penetrating mounting recess 6th through into the installation room 2 inserted or removed. The mounting direction 5 is exemplarily orthogonal or angled to the mounting recess 6th aligned or orthogonal or angled to a surface normal of the filter body 45 aligned. The filter element 7th is thus designed to be interchangeable, so that in the course of operation of the filter device 1 clogging filter element 7th can be exchanged as part of maintenance. This has the advantage that a continuous filter result can be achieved.

In the 1 it can also be seen that the filter element 7th in which in the installation room 2 when plugged in, the installation space 2 divided into two fluid spaces 8, 9 separated from one another, in particular fluid-tight or practically fluid-tight, namely into a raw fluid space 8th and a clean fluid room 9 . The filter device expediently flows during operation 1 Fluid preferably through a fluid inlet opening not illustrated in the figures into the raw fluid space 8th inside to the filter element 7th to apply. From the raw fluid space 8th the fluid flows through the filter element, releasing particles and / or substances 7th through to the clean room 9 . The filtered fluid, which is then referred to as pure fluid in specialist circles, can then exit the housing through a fluid outlet opening not illustrated in the figures 3 the filter device 1 outflow, for example in the direction of a downstream, likewise not illustrated, pure fluid consumer, for example an air conditioner. A flow direction is through the described flow path of the fluid 10 Are defined. It is especially in the interior of the spaces 8, 9 orthogonal or essentially orthogonal to the filter element 7th . Furthermore, one can imagine that the fluid with respect to the above-described flow path in the opposite direction through the filter device 1 flows so that a reverse flow direction 10 given is. In the 1 is the direction of flow 10 therefore illustrated by a double arrow.

The filter element 7th itself, as in particular 2 can be seen, a filter body 45 on. The Filter body 45 can be a round filter, a flat filter or a wound filter or, as in particular 1 and 2 indicated, a pleated flat filter body 46 be. In any case, the filter body defines 45 expediently an inflow-side fluid inflow surface 29 as well as an oppositely oriented outflow-side fluid outflow surface 30th , see esp. 1 and 2 ; provided the direction of flow 10 conversely, are also the inflow-side fluid inflow surface 29 as well as the downstream fluid outflow surface 30th interchanged with each other. According to 1 and 2 it can also be seen that the fluid inflow surface 29 to the raw fluid space 8th is oriented towards, while the fluid outflow surface 30th to the clean fluid room 9 is oriented. One can also say that the fluid inflow area 29 is loaded with raw fluid while from the fluid discharge surface 30th so to speak, pure fluid flows off. The filter body 45 also has a contiguous, circumferential and with the reference number 31 labeled filter jacket surface, which is the fluid inflow surface 29 with the fluid discharge area 30th so to speak flatly connects. According to 1 the filter jacket surface settles 31 composed of four partial filter jacket surfaces. Furthermore, the filter element 7th exemplarily on the filter body 45 arranged side stripes 28 on, see esp. 1 and 2 . For example, there are two side strips 28 on the filter body 45 and / or on the filter jacket surface 31 touching flat and on oppositely aligned filter jacket surfaces 31 arranged, for example by means of an adhesive. The hard shoulder 28 serve primarily to the filter body 45 to stiffen against undesired deformation. A filter body 45 with side stripes 28 can thereby withstand higher loads, in particular pressure loads, which can result from a pressure difference between the fluid spaces 8, 9, than the filter body 45 without side stripes 28 . In addition, the side strips 28 can also be used to implement additional filter functions, e.g. the side stripes can be used 28 also to provide a guide function for the filter element, which is not discussed in more detail here 7th use.

Especially in the 1 to 3 one can see that the filter device 1 with one on the case 3 mountable cover element 11 Is provided. The cover element 11 can for, in particular fluid-tight or practically fluid-tight, closing of the assembly recesses 6th serve so that through the assembly 4th of the filter element 7th provided mounting recess 6th through during the operation of the filter device 1 practically no leakage occurs. The cover element 11 can be in the form of a rectangular flat body 34 be designed and / or expediently made of a plastic material, a metal material or a composite material, see esp. 4th . When the cover element 11 , especially according to 1 to 4th , as a rectangular flat body 34 is designed, there can be at least two oppositely oriented large areas 32 and several narrow surfaces 33 have, see inbs. 2 to 4th . The large areas 32 each form a plane, compared to the narrow surfaces 33 , relatively large area. The large areas 32 each extend lengthwise in the direction of an in 1 and 4th registered main cover axis 35 and across it, widthwise, in the direction of an in 1 and 4th registered cross cover axis 36 . The main cover axis 35 and the cross cover axis 36 are exemplary in the 1 indicated by dashed lines.

In any case, it is provided that the cover element 11 as part of the assembly 4th of the filter element 7th either on the housing 3 can be fixed and / or locked or from the housing 3 is completely removable. This is also called assembling the cover element 11 designated. By assembling the cover element 11 can the mounting recess 6th either completely, in particular fluid-tight or practically fluid-tight, closed or open with the formation of a clear passage. The cover element can expediently 11 as part of its assembly on the housing 3 along a lid member mounting direction 48 be moved. Especially in the 1 and 2 is the cover element mounting direction 48 illustrated by a double arrow. The cover element assembly direction can expediently 48 and the mounting direction 5 the filter element 7th be parallel, angled, or right-angled to each other.

Because one is not working properly in the installation room 2 inserted filter element 7th and / or one that is not specified, in particular by the manufacturer, and is included in the installation space 2 inserted filter element 7th to undesirable leakage flows between the raw fluid space on the one hand 8th and on the other hand the clean fluid room 9 can lead, so to speak, to a contaminative pollution of the cleanroom 9 clean fluid located or a downstream clean fluid consumer, or deviations from the specified filter properties can occur, one has the filter device 1 with a locking arrangement 12th equipped, see esp. 1 , 2 and 3 . The lock order 12th can assemble the cover element 11 on the housing 3 optionally enable or disable this, so that the filter device 1 can either be commissioned or not. The lock order 12th can assemble the cover element 11 in particular block or enable depending on whether a filter element is specified, in particular by the manufacturer 7th properly in the installation room 2 is plugged in or not. This makes it possible for the manufacturer to ensure that a filter device functions properly 1 with only filter elements authorized by the manufacturer 7th to ensure.

To implement this function, the locking arrangement 12th a locking body 13th and a counter-locking body 14th , especially in the 3 to 5 can be recognized.

In particular according to 4th is illustrated that the locking body 13th exemplarily as a rod-shaped or bar-shaped lever body 18th is realized. The lever body 18th consists, for example, of a lever base 19th and a cohesively, especially integrally, adjoining and a free lever body end 21 forming lever link 20th . The lever base 19th is according to 4th on the cover element 11 cohesively and integrally arranged, while it is attached to the lever base 19th subsequent lever link 20th finger-like, especially parallel and at a distance from the cover element 11 sticks out. The lever link 20th extends lengthways in particular parallel or essentially parallel to the main cover axis 35 . In principle, it is of course also possible that the locking body 13th or the lever link 20th parallel or essentially parallel to the transverse cover axis 36 is aligned so that the locking body 13th or the lever link 20th in the direction of the flow, so to speak 10 is aligned.

The blocking body 13th , again especially according to 4th , is in the context of a blocking movement indicated by a double arrow 15th between an assembly of the cover element 11 on the housing 3 Approving approval position 16 and one an assembly of the cover element 11 on the housing 3 locking locked position 17th designed to be movable back and forth, especially designed to be elastic. In the 4th are both the release position 16 as well as the locked position 17th drawn. It is useful to use the locking body 13th or the lever link 20th and / or the lever base 19th from a plastic material, metal material or composite material exhibiting elastic material properties in order to achieve that these components are within the scope of the locking movement 15th Moving back and forth, especially while providing a sufficient service life or number of cycles.

The esp. In 3 and 5 visible counter-blocking body 14th can through a ramp body 22nd or alternatively directly from the filter element 7th itself or further alternatively from a hard shoulder 28 of the filter element 7th be educated. The ramp body 22nd according to 5 has an example of a flat ramp 23 on which the locking body described above 13th as part of the locking movement 15th can slide along touchingly. The ramp body 22nd also has one, especially on the filter element 7th or a hard shoulder 28 touchable base surface 24 , so to speak a support / assembly surface, by means of which the ramp body 22nd especially on the filter element 7th or a hard shoulder 28 is fixable. Between the in 5 on the back in the direction of the filter element 7th gazing base surface 24 and the ramp 23 is an angle spanned, also called the pitch angle 25th is designated. The angle of incline 25th is expediently provided in the range between 1 ° to 45 °, preferably it is 15 °, as in particular 5 can be seen.

According to 5 it can be seen that a special embodiment of the ramp 23 of the ramp body 22nd at least one flat release ramp section 26th and at least one flat locking ramp surface section delimited in this regard 27 Are defined. In the 5 is at the ramp 23 a dashed line is entered, which makes it easier to identify the two surface sections 26, 27. The release ramp surface section 26th and the lock ramp surface portion 27 stretch between themselves and the base surface 24 in each case different angles, in particular is the above-mentioned pitch angle 25th the release ramp surface section 26th assigned and especially selected greater than an angle between the base surface 24 and locking ramp surface section 27 . So the ramp has 23 at least two different surface sections 26, 27 each spanning different angles to the base surface. One can of course imagine that only a single ramp surface (without subdivision into surface sections) or more than two surface sections are provided. In particular, if the individual surface sections are each chosen to be infinitesimally small, a curved or curved course of the ramp can be achieved 23 with respect to the base area 24 define.

To the locking body 13th or the lever link 20th as part of the assembly of the cover element 11 for locking movement 15th to drive, so to the function of the locking arrangement 12th to be realized according to the description above, especially the locking body 13th in the release position 16 to operate, it is provided that the locking body 13th and the counter-locking body 14th can be brought into mutual contacting engagement, see in particular the 1 to 3 . To the locking body 13th or the lever link 20th in the release position 16 to move, it can be provided that the cover element 11 in the direction of the cover element mounting direction 48 to the housing 3 is arranged so that the locking body 13th or the lever link 20th especially initially with the blocking ramp surface section 27 comes into contact with each other. The blocking body 13th expediently takes the locked position in this state 17th a; in particular it is in an elastic rest position. The blocking body 13th or the lever link 20th can if the cover element 11 in the direction of the cover element mounting direction 48 is moved between the locking ramp section 27 and the enable ramp section 26th touching the locking ramp section 27 or at the enable ramp section 26th slide along. When from the blocking ramp section 27 to the Release ramp section 26th slide towards the lock body moves 13th or the lever link 20th , because of the slope of the locking ramp section 27 and / or the release ramp section 26th , continuously on the cover element 11 to until it is in the release position 16 goes, especially if it is the release ramp section 26th has reached; in particular is the locking body 13th or the lever link 20th in an elastically stretched position. This completes the assembly of the cover element 11 on the housing 3 Approved. Conversely, to the locking body 13th or the lever link 20th from the release position 16 in the locked position 17th to move, it can be provided that the cover element 11 in reverse cover element assembly direction 48 is moved so that the locking body 13th or the lever link 20th from the enable ramp section 26th to the blocking ramp section 27 slides.

The 6th shows the filter device in a plan view 1 out 1 according to an arrow VI entered there, the housing 3 the filter device 1 is largely omitted in order to make the filter element more recognizable 7th and the cover element 11 to favor. It can be seen that the locking body 13th the lock order 12th in its release position 16 moves and the cover element 11 consequently on the housing 3 immediately in front of the mounting recess 6th arranged and on the housing 3 is fixed and / or locked. Furthermore, according to 6th the enable ramp section 26th , the locking ramp section 27 as well as the base area 24 of the counter blocking body 14th to recognize the locking ramp section 27 exemplarily at an angle to the base surface 24 is aligned. The blocking body 13th or the lever link 20th is part of the assembly of the cover element 11 on the housing 3 touching along the locking ramp section 27 up to the enable ramp section 26th and there touching in the release position 16 moves in which the locking body 13th or the lever link 20th under elastic deformation on the counter-locking body 14th is present. In particular, you can still see that the free end of the lever body 21 of the locking body 13th into a recess in the housing 3 immersed, for example. To additionally provide a locking positive fit.

The 7th leaves the filter device in a further top view 1 out 1 recognize according to an arrow VII entered there, the housing again 3 the filter device 1 is largely omitted in order to make it easier to recognize. Furthermore, the filter element is 7th completely from the installation room 2 of the housing 3 away. Because now the counter-blocking body 14th in the form of the ramp body 22nd or the filter element 7th missing, the locking body can 13th or the lever link 20th not in the release position 16 be excited. The blocking body 13th or the lever link 20th is therefore automatically in the locking position described above 17th emotional. An assembly of the cover element 11 on the housing 3 is thus blocked, especially positively. For example, the blocking body strikes 13th with its free end of the lever body 21 to the housing 3 . Furthermore, one can use an esp. In 6th and 7th registered double arrow recognize that the locking movement 15th of the locking body 13th or the lever link 20th as part of the assembly 4th of the filter element 7th or as part of the assembly of the cover element 11 transversely or essentially transversely to the cover element assembly direction and parallel or essentially parallel to the assembly direction 5 of the filter element 7th is oriented.

The 8th and 9 each show a further exemplary embodiment of a filter device in a perspective view 1 , with within a housing indicated by dashed lines 3 the filter device 1 a filter element 7th is arranged for filtering a fluid. The case 3 has a mounting recess 6th on that, according to 8th , only partially through the cover element 11 is locked; in 8th you can see, so to speak, an intermediate position during the assembly of the cover element 11 . In any case, the embodiment differs according to FIG 8th and 9 from the previous embodiment in that the counter-locking body 14th from a ramp 23 is formed on both sides of the filter element 7th protruding projections 47 is edged. The protrusions 47 serve as a lateral guide of the touching the ramp 23 of the counter locking body 14th along sliding locking body 13th or lever link 20th , esp. The locking body 13th or the lever link 20th support it in contact with it. The protrusions 47 can also have a sealing function, especially between the cover element 11 and filter element 7th , provide.

In the 9 you can still see that the locking body 13th or the lever link 20th in comparison with the locking body 13th or lever link 20th according to the previous embodiment, relatively close to the cover element 11 is applied and according to a double arrow entered there in the context of the locking movement 15th is movable back and forth.

In the 10 and 11 a further embodiment of a filter device can be seen in a perspective view 1 detect. As in the previous exemplary embodiments, it is inside a housing indicated by dashed lines 3 the filter device 1 a filter element 7th arranged for filtering a fluid. The case 3 again has a mounting recess 6th on that, according to 10 , however, is fully open so that the filter element 7th either from the housing 3 can be removed or inserted, especially in the direction of the assembly 5 . In contrast to the two above exemplary embodiments, it is provided that the locking body 13th integral to the filter element 7th is arranged. According to 10 it can be provided that the locking body 13th in particular cohesively on one of the fluid inflow surface 29 and the fluid discharge area 30th circumferential filter jacket surface that connects with each other 31 of the filter element 7th or a hard shoulder 28 of the filter element 7th is arranged. Furthermore, in the 10 recognize that the locking body 13th or the lever link 20th according to an in 10 drawn double arrow in the context of the locking movement 15th is movable back and forth, expediently between the blocking position 17th and the release position indicated by dotted lines 16 and further expediently parallel or essentially parallel to the assembly direction 5 . To implement the locking function of the locking arrangement 12th it is further provided according to this embodiment that the counter locking body 14th directly from the cover element 11 itself is formed, see esp. 11 . Alternatively, the counter-locking body 14th , as described above, from a ramp body 22nd be educated. The ramp body 22nd can for this purpose, for example, on the cover element 11 be fixed, see esp. 11 .

Another embodiment of a filter device 1 is in the 12th and 13th shown. In the two perspective views it can be seen that within a housing again indicated by dashed lines 3 the filter device 1 a filter element 7th is arranged for filtering a fluid. The case 3 has a mounting recess 6th on that, according to 12th , again only partially through the cover element there 11 is locked so that you can enter 12th an intermediate position, so to speak, as part of the assembly of the cover element 11 sees. The illustrated embodiment differs from the preceding embodiments in that the locking arrangement 12th with a transverse or substantially transverse to the cover element mounting direction 48 and transversely or substantially transversely to the mounting direction 5 the filter element movable locking body 13th is equipped, see esp. 12th and 13th . This allows the locking body 13th by means of an adapted counter locking body 14th transversely or essentially transversely to the mounting direction 5 between the release position 16 and the locked position 17th as part of the locking movement 15th moved back and forth and especially in the release position 16 be moved. The counter blocking body 14th has in particular a release ramp section 26th and a lock ramp section 27 on, as before, but a curved, in particular arcuate, transition section is interposed, which it the locking body 13th enables continuous, in particular not abruptly, between the release ramp section 26th and the lock ramp section 27 to slide back and forth. It should also be mentioned that in 13th for better understanding of the blocking body 13th both in the release position 16 as well as the locked position 17th is registered, although the locking body 13th during operation of the filter device 1 actually only occupies one or the other position.

The 14th to 17th show a further embodiment of a filter device 1 . In particular in 14th it can be seen that the filter device 1 about housing 3 disposes. Inside the case 3 is again a filter element 7th arranged for filtering a fluid, in particular with a pleated filter body 45 . In contrast to the previous exemplary embodiments, the cover element is 11 with two separate tab-like locking bodies 13th a blocking order 12th equipped, each of a large area 32 of the cover element 11 stand out orthogonally. As a counterpart to the blocking bodies 13th is provided the filter element 7th with two counter baffles 14th equip that with the blocking bodies 13th cooperate to the assembly of the cover element 11 on the housing 3 optionally to enable or disable. Any locking body can be used for this purpose 13th with a counter-locking body 14th can be brought into contact, wherein the locking body 13th each in opposite directions to each other, especially transversely to the assembly direction 5 , expand elastically, see in particular the 15th .

In the 16 and 17th are in perspective views on the one hand with counter-locking bodies 14th equipped filter element 7th and on the other hand a cover element 11 with blocking bodies 13th shown.

Furthermore show the 18th and 19th another embodiment, namely a filter device 1 with a housing indicated with dashed lines 3 . Inside the case 3 is again a filter element 7th arranged for filtering a fluid. The filter device 1 can with an in 18th and 19th unrecognizable blocking arrangement 12th be equipped as described above. The case 3 again has a mounting recess 6th for the filter element 7th on. According to the 18th and 19th is the mounting recess 6th from the cover element there 11 completely and especially fluid-tight closed. On the housing 3 is still one between a closed position 38 (see esp. 18th ) and an open position 39 (see esp. 19th ) Pin-like slider that can be moved back and forth 37 arranged, by means of which the cover element 11 on the housing 3 can be locked, for example. To the cover element 11 to secure against impacts or the like. The slider 37 is according to 18th in the closed position 38 arranged so that the cover element 11 is secured in a locked state, so to speak. In addition, the 19th a conceivable open position 39 of the slide 37 . The cover element is in this state 11 not on the housing 3 secured, so that it is especially during the assembly of the cover element 11 from casing 3 can be removed, especially around the filter element 7th switch. In the closed position 38 the slide engages 37 through one in the cover element 11 and / or the housing 4th introduced slide guide groove 40 through and acts with the locking body 13th and / or the cover element 11 touching, especially clamping, together around the cover element 11 on the housing 3 releasably lock. In the open position 39 the slide engages 37 also through the slide guide groove 40 through it, but without the locking body 13th and / or the cover element 11 touching, especially clamping, to work together. For guiding the slide 37 is the slide guide groove 40 exemplary with a coherent guide surface 41 or a multi-surface guide surface arrangement 42 fitted. On the guide surface 41 or the guide surface arrangement 42 can the slide 37 Make contact and slide along, especially between the open position 39 and the closed position 38 back and forth. The slider 37 can have a cylindrical shaft body with a round cross-section 43 and a handle part integrally connected to it on the head side, in particular in a materially bonded manner 44 exhibit. This makes it possible, especially by hand, to touch the slide 37 can grab the slider 37 so to speak manually between the closed position 38 and the open position 39 to move back and forth.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was 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.

Patent literature cited

• DE 10245427 A1 [0004]
• DE 202006004420 U1 [0005]
• DE 202005011079 [0005]
• DE 4234047 C1 [0005]
• EP 2397210 A1 [0005]

Claims (16)

Filter device for filtering a fluid, - with a housing (3) having an installation space (2), - with an installation (4) in the direction of an installation direction (5) through an installation recess (6) of the housing (3) in the installation space (2) insertable and removable filter element (7) for filtering a fluid, - wherein the filter element (7) separates a raw fluid space (8) and a clean fluid space (9) when inserted into the installation space (2), - wherein in Operation of the filter device (1) fluid flows with the formation of a flow direction (10) from the raw fluid space (8) through the filter element (7) to the clean room (9), - with a cover element (11) that can be mounted on the housing (3) for closing the mounting recess (6), characterized in that the filter device (1) has a locking arrangement (12) for optionally releasing or locking assembly of the cover element (11) on the housing (3) from a locking body (13) and has a counter locking body (14), - the locking body (13) in the context of a locking movement (15) between a release position (16) releasing an assembly of the cover element (11) on the housing (3) and an assembly of the cover element (11) on the housing (3) locking locking positions (17) can be moved back and forth and - wherein the locking body (13) and the counter locking body (14) can be brought into mutual contacting engagement in order to actuate the locking body (13) during the locking movement (15) so that assembly of the cover element (11) on the housing (3) is optionally enabled or blocked. Filter device after Claim 1 - characterized in - that the locking body (13) is a rod-shaped or bar-shaped lever body (18) made up of a lever base (19) and a lever member (20) adjoining it in a cohesive manner, in particular integrally, and forming a free lever body end (21) , and / or - that the locking body (13) is made of a plastic material, metal material, fleece material or composite material exhibiting elastic material properties, and / or - that the locking body (13) has a consistently constant two-dimensional locking body cross-section in the direction of its main extent. Filter device after Claim 1 or 2 , characterized in - that the counter-blocking body (14), in particular cohesively or integrally, is arranged on the filter element (7), or - that the counter-blocking body (14) on a side strip (28) of the filter element (7), in particular cohesively or integrally, is arranged, or - that the counter-locking body (14), in particular cohesively or integrally, is arranged on the cover element (11), and / or - that the counter-locking body (14) is a ramp body (22), which by means of a predetermined or Pre-determinable ramp (23) is equipped, and / or - that between the ramp (23) and a planar base surface (24) of the ramp body (22) a slope angle (25) is defined, which is in the range between 1 ° and 45 °. Filter device after Claim 2 and 3 , characterized in that the lever member (20) slides along the ramp (23) in contact with the assembly of the cover element (11) on the housing (3) and under elastic deformation into the release position (16) and under elastic deformation back into one of the Locking positions (17) is movable. Filter device according to one of the preceding claims, characterized in that the locking body (13) in the context of the assembly of the cover element (11) on the housing (3) by means of the counter locking body (14) in the direction of the assembly direction (5) between the release position (16) and the locking positions (17) can be moved back and forth and, in particular, can be moved into the release position (16). Filter device according to one of the preceding claims, characterized in that the blocking body (13) during the assembly of the cover element (11) on the housing (3) by means of the counter blocking body (14) transversely or essentially transversely to the assembly direction (5) between the release position ( 16) and the blocking positions (17) can be moved back and forth and, in particular, can be moved into the release position (16). Filter device according to one of the preceding claims, characterized in - that the blocking body (13), in particular integrally, is arranged on the cover element (11), or - that the lever base (19) of the blocking body (13), in particular integrally or cohesively, is arranged on the cover element (11), or - that the blocking body (13), in particular integrally or cohesively, is arranged on the filter element (7), or - that the lever base (19) of the blocking body (13), in particular integrally or cohesively , is arranged on the filter element (7). Filter device according to one of the preceding claims, characterized in that the counter-blocking body (14) is formed directly by the filter element (7) or by a side strip (28) of the filter element (7), especially glued to the filter element. Filter device according to one of the preceding claims, characterized in that the filter element (7) has a fluid inflow surface (29) oriented against the flow direction (10) upstream of the raw fluid space (8) and a fluid outflow surface (30) oriented downstream with the flow direction (10), wherein the blocking body (13) or the lever base (19) of the blocking body (13), in particular integrally or cohesively, is arranged on a circumferential filter jacket surface (31) of the filter element (7) that connects the fluid inflow surface (29) and the fluid outflow surface (30) is. Filter device after Claim 9 , characterized in that the blocking body (13) or the lever member (20) of the blocking body (13) is oriented parallel, transversely or essentially transversely with respect to the fluid inflow surface (29) and the fluid outflow surface (30). Filter device according to one of the preceding claims, characterized in that the cover element (11) is a flat body (34) having at least two oppositely oriented large surfaces (32) and narrow surfaces (33), which extends lengthwise while forming a main cover axis (35) and extends transversely to the width to form a transverse cover axis (36). Filter device after Claim 11 , characterized in that the locking body (13) or the lever member (20) of the locking body (13) is oriented transversely or substantially transversely or parallel with respect to the main cover axis (35) and / or, in particular cohesively or integrally, on a large surface (32 ) of the flat body (34) of the cover element (11) is arranged. Filter device according to one of the preceding claims, in particular according to Claim 11 , characterized in that two separate tab-like locking bodies (13) are arranged on the cover element (11), each of which protrudes orthogonally or substantially orthogonally from a large surface (32) of the cover element (11), the locking bodies (13) each having one of two ramps (23) arranged on the filter element (7) can be brought into contact and the locking bodies (13) are elastically expandable to one another in opposite directions, especially in opposite directions with respect to the main cover axis (35). Filter device according to one of the preceding claims, characterized in that on the housing (3) there is arranged a slide (37) which can optionally be moved back and forth between a closed position (38) and an open position (39), which in the closed position (38) is by a Slider guide groove (40) through with the locking body (13) and / or the cover element (11) touching, especially clamping, cooperates in order to releasably fix and lock the cover element (11) on the housing (3). Filter device after Claim 14 , characterized in - that the slide guide groove (40) for guiding the slide (37) comprises a guide surface (41) or a guide surface arrangement (42) on which the slide (37) is in contact, and / or - that the slide (37 ) has a cylindrical shaft body (43) with a round cross-section and a handle part (44) integrally adjoining it on the head side, the slide (37) expediently manually by hand by means of the handle part (44) between the closed position (38) and an open position ( 39) can be moved back and forth. Filter element, in particular for use in a filter device according to the preceding claims, - With a filter body (45) having a circumferential filter jacket surface (31), in particular a pleated flat filter body (46), for filtering a fluid, - wherein the filter jacket surface (31) connects an upstream-oriented fluid inflow surface (29) of the filter body (45) and a downstream-oriented fluid outflow surface (30) of the filter body (45), - With at least one locking body (13) being arranged on the filter jacket surface (31) or on a side strip (28) arranged on the filter jacket surface (31), which has a lever base (19) and a free lever body end, in particular cohesively or integrally (21) forming rod-shaped or bar-shaped lever member (20), wherein at least the lever member (20) is oriented parallel, transversely or substantially transversely to the fluid inflow surface (29) and / or to the fluid outflow surface (30).

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