DE102015009535A1 - Filter housing for a fluid filter - Google Patents

Abstract

The invention relates to a filter housing for a fluid filter, in particular air filter, with an inflow opening and an outflow opening for a fluid to be filtered; a filter element receiving space in the direction of flow guidance of the fluid between the inflow opening and the outflow opening, which is designed for releasably holding a filter element, through which the fluid is passed to its filtering, and having an insertion opening for the filter element; with a lid for releasing and closing the insertion opening; with a provided in the filter element receiving space sealing surface for the filter element; with a clamping bracket, which is designed to exert a resilient pressing force on the filter element to press it against the sealing surface, and mounted in the filter element receiving space, wherein the clamping bracket is in operative connection with the lid, such that closing the lid at least part of the Clamping in the direction of the sealing surface moves to press at least a portion of the filter element against the sealing surface or pressed against an open position of the lid reinforced against the sealing surface.

Description

Technical area

The present invention relates to a filter housing for a fluid filter, in particular air filter, for example for a motor vehicle. In this case, the filter housing can be used with a filter element used accordingly, for example in the air supply of an internal combustion engine in a motor vehicle.

State of the art

Generic filter housing, for example, for flat filter elements or bellows or Doppelbalgfilterelemente, as the present invention particularly relates, for example, in motor vehicles, especially in construction and agricultural machinery, provided for engine air filtration, that is positioned in the air supply of the internal combustion engine to one of the internal combustion engine to filter supplied airflow. Of course, other applications come into consideration, for example, in air conditioning systems, especially here in motor vehicles, especially construction and agricultural machinery.

Such a filter housing has a filter element receiving space, in which the filter element is removably introduced, wherein the filter element has a filter medium through which the fluid to be filtered, in particular air, is passed, wherein the filter medium herausfililternde particles that are carried in the fluid to be filtered , withholds. Accordingly, the filter element has a so-called. Raw side and a so-called. Reinseite and the filter housing has corresponding to a flow opening for guiding the fluid to be filtered on the raw side of the filter element and a discharge opening for discharging the filtered fluid from the clean side of the filter element.

In order to prevent a portion of the fluid to be filtered flows from the inlet opening of the filter housing on the filter element and thus the filter medium to the outflow opening of the filter housing and is thus not filtered, a seal between the inlet opening and the outflow opening of the filter housing is necessary, which a sealing surface is provided in the filter element receiving space, at which the filter element with a corresponding sealing surface, in the present case called counter surface, is applied. As a rule, a seal is provided on the sealing surface of the filter element receiving space and / or the sealing surface of the filter element. This seal must be sufficiently thick in order to compensate for tolerances occurring between the filter housing and the filter element during operation of the motor vehicle by changes in position of the filter housing and the filter element relative to each other. This leads to comparatively complex and expensive seals.

In order to avoid an undesirable displacement of the filter element in the filter housing, it has already been proposed to support the filter element with its sealing surface on the sealing surface of the filter element receiving space in the filter housing by a bracket is provided, with which a supporting force is applied. For example, describes US 2004/0098959 A1 for the field of fans, in particular for venting a housing of electronic components, the insertion of a filter element in a housing, wherein the filter element by means of a cover flap, to which a bracket is attached, is held. However, due to the field of application no special sealing of the filter element in the filter housing is necessary, so that an elastic tension can be omitted.

US 2006/0080949 A1 describes an air filter for an internal combustion engine, in which the filter element between two housing halves, which are connected via a hinge joint to each other, is jammed. The deadlock occurs through the two housing halves themselves.

US 2008/0022641 A1 describes holding a filter element by means of a lid having two sword-like projections which engage in corresponding receptacles of the filter housing.

According to US 2008/0216455 A1 the filter element is inserted into a kind of drawer, which is inserted into a filter housing and locked by a clamping bracket outside the filter housing.

For further printed prior art reference is made to:
US 2008/0066436 A1
US 2010/0037574 A1
US 2011/0173937 A1
US 2012/0067013 A1
US 2012/0110962 A1
WO 2009/100115 A2
EP 0815918 A2
EP 2 127 722 A1
FR 2912665 A1
JP 09-122417 A
US 5,458,667 A.
US 6217627 B1
US 2004/0139707 A1 ,

There are also known in practice air filter with air filter housings and air filter elements, in which the air filter element with metal straps which engage the outside of the filter housing and be closed manually, clamped in the air filter housing.

Thus, although many embodiments of air filter housings have already become known, there is a need to simplify the sealing between the filter element and the filter housing on the one hand and, on the other hand, to design it as reliably as possible.

The present invention is therefore the object of developing a filter housing for a filter element of the type described above such that a particularly secure seal between a filter element used in the filter housing and the filter housing is achieved to seal the raw side of the clean side, wherein the inventive Solution should be robust and relatively cheap.

Disclosure of the invention

The object of the invention is achieved by a filter housing for a fluid filter, in particular air filter, for example for a motor vehicle such as construction or agricultural machinery, with an inflow opening and an outflow opening for a fluid to be filtered and with a filter element receiving space in the direction of flow guidance of the fluid between the inflow opening and the outflow opening, wherein the filter element receiving space is designed for releasably holding a filter element, through which the fluid is to be filtered through it, and has an insertion opening for the filter element.

The filter housing according to the invention also preferably has a cover for releasing and closing the insertion opening of the filter element receiving space.

Furthermore, a preferably flat sealing surface for the filter element positioned in the filter element receiving space is preferably provided in the filter housing, as well as a clamping bracket which is designed to exert an elastic contact pressure on the filter element in order to press the filter element against the sealing surface. The clamping yoke is mounted in the filter element receiving space and is operatively connected to the lid such that closure of the lid moves at least a portion of the clamp in the direction of the sealing surface to preferably axially compress at least a portion of the filter element against the sealing surface. If the filter element is already pressed by its insertion into the filter element receiving space with the part on which the closing of the lid acts on the clamping bracket against the sealing surface before the lid of the filter housing is closed, the closing causes the lid that at least one Part of the tensioning bow is moved in the direction of the sealing surface in order to press at least this part of the filter element in comparison to the open position of the lid reinforced against the sealing surface. It is also possible to provide a sealing surface on the housing, which is designed in the form of a particularly short, inwardly facing tube inner surface, so that a filter element-side radial seal can abut radially on this tubular sealing surface.

Advantageously, the lid is in mechanical engagement with the clamping bracket or is positioned relative to the clamping bracket, that the lid passes in its closing in such a mechanical engagement with the clamping bracket.

According to one embodiment of the invention, the clamping bracket on at least one movable in the filter housing end, which is connected to its displacement when closing the lid to the lid, in particular via a lever mechanism.

It is favorable if a toggle mechanism is formed between the cover and the at least one displaceable end of the tensioning bow. In such a toggle mechanism changes advantageously with each angle of rotation of the lid during movement between its open position and its closed position, the transmission ratio, via which the clamping force is applied to the filter element to press this against the sealing surface in the filter housing, advantageously such that the clamping force increases with increasing rotation of the lid in the direction of its closed position.

For example, the clamping bracket has at least one movable in the filter housing end, which is positioned in such a position relative to the lid that it comes when closing the lid into engagement therewith and is displaced by a continued closing movement of the lid thereof.

According to an advantageous embodiment of the invention, the at least one displaceable end of the tension bow is guided in a slotted guide in a wall of the filter element receiving space.

It can be provided that the at least one displaceable end of the clamping bracket is guided, at least after its engagement with the cover or, alternatively, always in a sliding guide of the cover.

It is favorable if the tension bow has a second axial end opposite to the at least one displaceable end, which is mounted fixedly and rigidly or displaceably, pivotably and / or rotatably in the filter housing, in particular in a wall of the filter element receiving space.

Advantageously, the lid is associated with at least one securing element, in particular a wire bow closure, in order to lock the lid in its closed position. Such a securing element can be provided on a component of the filter housing accommodating the lid and / or on the lid.

An embodiment of the invention provides that the lid can be locked in its closed position by means of self-locking.

It is favorable if the cover is mounted by means of a hinge joint rotatably between its insertion opening releasing position, that is, its open position, and its closed position

For example, the clamp is non-positively and / or positively mounted in the filter element receiving space and the lid is movable at least relative to a stationary part of the tension bow in the filter element receiving space.

In a particularly favorable design, the cover has a closing direction which is at least in a final movement portion of the lid before reaching its closed position at an angle or perpendicular to a direction of the contact pressure of the clamping bracket for pressing the filter element to the sealing surface.

For example, the filter element receiving space has an insertion direction for inserting the filter element through the insertion opening into the filter element receiving space, which extends at least substantially parallel or plane parallel to a plane in which the sealing surface extends at least partially or completely.

The inventive design of the filter housing a conventional filter element can be better pressed without changing its outer shape against the sealing surface in the filter element receiving space, a tolerance compensation is ensured by the spring action of the clamping bracket and advantageous over the sealing surface or provided between the sealing surface and the filter element seal tolerance compensation is no longer necessary. The solution according to the invention is robust and relatively cheap and is particularly suitable for filter elements with relatively large dimensions, as these usually also a particularly large sealing surface is provided in the filter element receiving space of the filter housing.

In a method for changing a filter element in a filter housing according to the invention, only the cover needs to be opened to release the insertion opening for the filter element, possibly after the securing element, with which the lid is locked in its closed position, has been actuated to open it, and then the filter element are pulled out of the filter element receiving space. When the lid is opened, at least part of the tensioning bow, in particular its end facing the cover, moves away from the sealing surface in the filter element receiving space, so that the tension of the filter element against the sealing surface is at least partially canceled, at least in this part. After the filter element has been removed from the filter element receiving space, a new filter element can be inserted into the filter element receiving space, wherein subsequently the insertion opening is closed with the lid, which causes the desired movement of at least the part of the clamping bracket in the direction of the sealing surface in order to thereby at least to brace or stronger to brace a corresponding part of the sealing element against the sealing surface in the filter element receiving space. After the lid has been completely closed, it can optionally be locked by means of the securing element.

The sealing element advantageously has an edge running around at least partially over its outer circumference, which forms a counter surface for the sealing surface in the filter element receiving space for sealing the filter element in the filter housing. The edge can be advantageously formed by a radial projection on which the clamping bracket engages on the opposite side of the counter surface.

Brief description of the drawings

The invention will be described below by way of example with reference to two embodiments and the figures. Show it:

1 an inventive filter housing with the lid open at the beginning of the insertion of a filter element;

2 the filter housing from the 1 with the lid open and the filter element fully inserted into the filter element receiving space;

3 the filter housing from the 1 and 2 after closing the lid;

4 an alternative design of a filter housing according to the invention.

Embodiments of the invention

From the 1 to 3 It can be seen how a filter element is inserted into a filter housing according to the invention and sealed by clamping against it, so that the raw side is fluid-tightly separated from the clean side and thus the fluid to be filtered, in particular air, flows exclusively through a filter medium provided in the filter medium to from the To reach inflow side to the downstream side of the filter housing or the filter element.

In detail shows 1 a filter housing for a filter, in particular air filter, which has a flow opening 1 on the raw side and a discharge opening 2 on the clean side. In the illustrated embodiment, closes to the inflow opening 1 the filter housing first a cyclone block 3 to, in particular in the form of a multi-cyclone block, which serves as a pre-separator and a discharge opening 4 Having contained for in the fluid to be filtered particles. Such a pre-separator extends the service life of the filter element.

In the flow direction of the fluid to be filtered closes to the cyclone block 3 the filter element receiving space 5 on, from which then the fluid to be filtered to the discharge opening 2 flows. The filter element receiving space 5 is designed to be a filter element 6 with the actual filter medium that does the filtering work to record. In the filter element 6 it is an easily replaceable unit, so after reaching the service life of the filter medium or the filter element 6 this easily from the filter element receiving space 5 taken out and against a new filter element 6 can be exchanged.

To the filter element 6 into the filter element receiving space 5 insert and pull out of this, the filter element receiving space 5 an insertion opening 7 on, in the embodiment shown laterally on the filter element receiving space 5 parallel to the main flow direction of the medium to be filtered from the flow opening 1 to the discharge opening 2 extends. In the illustrated embodiment, this main flow is rectilinear, since the inflow opening 1 and the discharge opening 2 aligned with each other and are aligned parallel to each other. However, this could be chosen differently.

In the embodiment shown, the insertion opening 7 provided on the upper side of the filter housing when it is aligned in the intended use, here on the opposite side as the discharge nozzle 4 ,

To prevent fluid to be filtered from the insertion opening 7 from the filter element receiving space 5 flows out, is the insertion opening 7 with a lid 8th lockable, in the embodiment shown hinged next to the insertion opening 7 is connected and on the insertion opening 7 can be swiveled and swung away from this to the insertion opening 7 optionally open or close. The lid 8th has a fuse element 9 , here in the form of a wire hanger, on to the lid 8th in its closed state, in which it has the insertion opening 7 completely locks, to lock.

In the filter element receiving space 5 is a sealing surface 10 provided along the outer periphery of the filter element receiving space 5 extends and with a mating surface 11 on the filter element 6 works together to the inflow opening 1 fluid-tight from the discharge opening 2 and thereby separate the raw side from the clean side. In the embodiment shown is on the opposite surface 11 a seal 12 , In particular an axial seal, provided, which has a certain elasticity and / or is plastically deformable.

Although in the illustrated embodiment, the sealing surface 10 on the side of the discharge opening 2 the filter element receiving space 5 is provided and according to the sealing surface 10 in the direction of the flow opening 1 is aligned as well as the counter surface 11 opposite to this in the direction of the discharge opening 2 , this is not mandatory and the sealing surface 10 could accordingly also on the side of the flow opening 1 the filter element receiving space 5 be provided.

In the filter element receiving space 5 is a clamp 13 provided, extending from one of the insertion opening 7 far end of the filter element receiving space 5 to near the insertion opening 7 extends. The clamp 13 has a first axial end 14 and a second axial end 15 on. The second axial end 15 is at the insertion opening 7 far end of the filter element receiving space 5 on a wall 16 the filter element receiving space 5 connected, which represents a lower wall in the illustrated orientation of the filter housing. The first axial end 14 of the tension bracket 13 is movable in two side walls 17 the filter element receiving space 5 connected, based on the orientation shown here, wherein in the side view shown only a side wall 17 is recognizable.

In a view of the outflow opening 2 has the clamp 13 which is advantageously made of wire, the shape of a U, with two lateral legs along the walls 17 extend and over a lower leg that extends along the wall 16 extends, are interconnected. The lower leg of the tension bracket 13 is rotatable above the rotation axis 18 on the wall 16 attached, whereas the two free ends of the tension bow 13 which the first axial end 14 of the tension bracket 13 train, each in a slide guide 19 in the side walls 17 can move, in the direction of the sealing surface 10 the filter element receiving space 5 and away from it.

The clamp 13 has two or more, for example 4 axial projections 20 on, pointing towards the sealing surface 10 extend and along the sealing surface 10 are arranged at a distance from each other. The second axial end 15 closer projections 20 serve for pressing a first portion of the counter surface 11 to the sealing surface 10 , already if the filter element 6 completely into the filter element receiving space 5 has been used and before the lid 8th was closed as in 2 and the first axial end 14 closer projection 20 serves to press a second portion of the counter surface 11 to the sealing surface 10 if the first axial end 14 of the tension bracket 13 by closing the lid 8th in the direction of the sealing surface 10 has been moved, as in the 3 is shown.

In the embodiment shown, the filter element 6 Angled or perpendicular to the main flow direction of the fluid to be filtered in the filter element receiving space 5 inserted. Accordingly closes the lid 8th in that direction, at least just before reaching its fully closed position. To now this closing movement of the lid in a direction at an angle or perpendicular thereto to the first axial end 14 of the tension bracket 13 to be able to transfer, is the said slide guide 19 provided in the direction of the main flow direction of the fluid to be filtered on the sealing surface substantially 10 to proceed, starting from its the sealing surface 10 far end, in which the first axial end 14 of the tension bracket 13 with the lid open 8th located.

In the present case, it is said that the second axial end 15 rotatable in the wall 16 is stored, this can on the one hand a rotating sliding of the corresponding second axial end 15 in the lower wall 16 mean. Otherwise, however, the rotation can also be caused by a torsion within the tension bow 13 be generated.

Also the lid 8th has a slotted guide in the embodiment shown here 21 on, which here advantageous, but not mandatory, four scenes, namely two scenes for each free end of the tension bow 13 at its first axial end 14 , This backdrop tour 21 How to make a comparison of the 2 and 3 can recognize that the first axial end 14 within the slotted guide 19 by closing the lid on the sealing surface 10 is moved and thereby a projecting on the filter element 6 provided edge 22 , which is the counter surface 11 forms, in the direction of the sealing surface 10 suppressed. The scenery tour 21 of the lid 8th causes an implementation of the direction of movement of the lid 8th in a movement of the first axial end 14 of the tension bracket 13 Here, the two free ends, in a motion perpendicular or angled to this.

Although it is shown in the embodiment shown that the first axial end 14 near the lead 20 before moving the first axial end 14 by closing the lid 8th in the direction of the sealing surface 10 a distance to the edge 22 could, according to an alternative embodiment, also, similar to that shown, the second axial end 15 close margin 20 , Already a touch and possibly a comparatively easier clamping between the first axial end 14 close margin 20 and the edge 22 be provided, in which case by closing the lid 8th the tension of the corresponding projection 20 is enlarged.

In the embodiment according to the 4 is the lid 8th by means of a lever mechanism 23 , in particular toggle mechanism, at the first axial end 14 of the tension bracket 13 connected. Thus, there is a permanent mechanical engagement between the clamp 13 and the lid 8th , Again, the first axial end 14 by closing the lid 8th to the insertion opening 7 the filter element receiving space 5 to close in the previously a filter element 6 was introduced, in the direction of the sealing surface 10 pressed to the edge 22 trained counter surface 11 against the sealing surface 10 to press. In the in the 4 embodiment shown already takes place at the onset of the filter element 6 into the filter element receiving space 5 an attachment of both or all projections 20 on the edge 22 and closing the lid 8th results in increased pressing of at least the first axial end 14 close tabs 20 or from both or all projections 20 in the direction of the sealing surface 10 , However, a function according to the embodiment in the 1 to 3 be provided.

The lever mechanism is advantageous 23 executed such that when closing the lid of the lever mechanism 23 is moved beyond its dead center and thus a self-locking of the lid 8th is adjusted against unintentional opening.

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

• US 2004/0098959 A1 [0005]
• US 2006/0080949 A1 [0006]
• US 2008/0022641 A1 [0007]
• US 2008/0216455 A1 [0008]
• US 2008/0066436 A1 [0009]
• US 2010/0037574 A1 [0009]
• US 2011/0173937 A1 [0009]
• US 2012/0067013 A1 [0009]
• US 2012/0110962 A1 [0009]
• WO 2009/100115 A2 [0009]
• EP 0815918 A2 [0009]
• EP 2127722 A1 [0009]
• FR 2912665 A1 [0009]
• JP 09-122417 A [0009]
• US 5458667A [0009]
• US 6217627 B1 [0009]
• US 2004/0139707 A1 [0009]

Claims (14)

Filter housing for a fluid filter, in particular air filter, with a flow opening ( 1 ) and a discharge opening ( 2 ) for a fluid to be filtered; with a filter element receiving space ( 5 ) in the direction of a flow guidance of the fluid between the inflow opening ( 1 ) and the discharge opening ( 2 ), for releasably holding a filter element ( 6 ), through which the fluid is routed to its filtering, is executed, and an insertion opening ( 7 ) for the filter element ( 6 ) having; with a lid ( 8th ) for releasing and closing the insertion opening ( 7 ); with one in the filter element receiving space ( 5 ) provided sealing surface ( 10 ) for the filter element ( 6 ); with a clamping bracket ( 13 ), which for exerting an elastic contact force on the filter element ( 6 ) against this against the sealing surface ( 10 ) and in the filter element receiving space ( 5 ) is mounted, wherein the clamping bracket ( 13 ) in operative connection with the lid ( 8th ), such that closing the lid ( 8th ) at least a part of the tension bracket ( 13 ) in the direction of the sealing surface ( 10 ) is moved to at least a part of the filter element ( 6 ) against the sealing surface ( 10 ) or against an open position of the lid ( 8th ) reinforced against the sealing surface ( 10 ) to press. Filter housing according to claim 1, characterized in that the lid ( 8th ) in mechanical engagement with the clamping bracket ( 13 ) or in such a way opposite the clamping bracket ( 13 ) is positioned so that it comes into such a mechanical engagement when closing. Filter housing according to claim 2, characterized in that the clamping bracket ( 13 ) at least one sliding in the filter housing end ( 14 ), which causes its displacement when closing the lid ( 8th ) is connected to this, in particular via a lever mechanism ( 23 ). Filter housing according to claim 3, characterized in that between the lid ( 8th ) and the at least one displaceable end ( 14 ) of the tension bracket ( 13 ) A toggle mechanism is formed. Filter housing according to claim 2, characterized in that the clamping bracket ( 13 ) at least one sliding in the filter housing end ( 14 ), which in such a way opposite the lid ( 8th ) is positioned so that when closing the lid ( 8th ) comes into engagement with this and by a continued closing movement of the lid ( 8th ) is moved by this. Filter housing according to one of claims 3 to 5, characterized in that the at least one displaceable end ( 14 ) in a slotted guide ( 19 ) in a wall ( 17 ) of the filter element receiving space ( 5 ) is guided. Filter housing according to one of claims 5 or 6, characterized in that the at least one displaceable end ( 14 ) after its engagement with the lid ( 8th ) in a slotted guide ( 21 ) of the lid ( 8th ) is guided. Filter housing according to one of claims 3 to 7, characterized in that the clamping bracket ( 13 ) to at least one displaceable end ( 14 ) opposite second axial end ( 15 ) which is stationary and rigid, or displaceable, pivotable and / or rotatable in the filter housing, in particular a wall ( 16 ) of the filter element receiving space ( 5 ) is stored. Filter housing according to one of claims 1 to 8, characterized in that the lid ( 8th ) at least one securing element ( 9 ), in particular a wire clip, is assigned to the lid ( 8th ) in its closed position. Filter housing according to one of claims 1 to 9, characterized in that the lid ( 8th ) is locked by means of self-locking in its closed position. Filter housing according to one of claims 1 to 10, characterized in that the lid ( 8th ) by means of a hinge joint rotatable between its insertion opening ( 7 ) releasing position and its closed position is stored. Filter housing according to one of claims 1 to 11, characterized in that the clamping bracket ( 13 ) positively and / or positively in the filter element receiving space ( 5 ) is mounted and the lid ( 8th ) at least relative to a stationary part of the tension bow ( 13 ) in the filter element receiving space ( 5 ) is movable. Filter housing according to one of claims 1 to 12, characterized in that the cover ( 8th ) has a closing direction which, at least in a last movement section of the lid ( 8th ) before reaching its closed position at an angle or perpendicular to a direction of the contact pressure of the clamping bracket ( 13 ) for pressing the filter element ( 6 ) on the sealing surface ( 10 ) stands. Filter housing according to one of claims 1 to 13, characterized in that the filter element receiving space ( 5 ) an insertion direction for inserting the filter element ( 6 ) through the Insertion opening ( 7 ) into the filter element receiving space ( 5 ) which extends at least substantially parallel to a plane in which the sealing surface ( 10 ) at least partially extends.

Images