DE102016010526A1 - Cabin air filter element and filter assembly - Google Patents

Abstract

A cabin air filter element (100) has a fold pack (24) comprising a zig-zag folded filter medium (9), the fold pack (9) being disposed between a first (11) and a second sideband (12). At least two spacer elements (25, 26) for spacing the first side band (11) from a filter housing-side contact surface (27) are mounted on the first side band (11).

Description

Technical area

The present invention relates to a filter element, in particular an interior air filter element for filtering air for the interior of a vehicle or building. Furthermore, the invention relates to a filter assembly with such a filter element.

Although applicable to any filter elements and arrangements, the present invention and its underlying problem will be described below for a cabin filter of a motor vehicle.

The increasing air pollution, especially in large cities, in connection with the use of modern air conditioning systems makes it necessary to clean the outside of the interior of a motor vehicle and conditioned or conditioned air by means of suitable filters. For this purpose, for example, particulate filter, odor filter or their combination with each other come into consideration, which should filter or adsorb particulate matter and odors contained in the ambient air as well as possible.

For filtering air for the interior of a motor vehicle, folded or pleated filter materials, such as filter fleeces forming a fold pack, are often used. For this purpose, an initially flat filter material sheet is folded in a zigzag shape. The fold pack is held, for example, by side bands and headbands or other frame. Such filter elements can be fixed exchangeably in a filter holder. The filter assembly thus formed may be installed in an air conditioning system of a corresponding motor vehicle.

On the one hand, it is desirable to provide filter elements with easily produced geometries and smooth surfaces and, on the other hand, to make favorable use of the space available in the vehicle. Furthermore, a laterally good seal with respect to the female housing is necessary.

State of the art

In the past, nut and spring-like guiding or positioning elements have been provided laterally on side or head straps. DE 10 2014 002 647 A1 discloses z. As the sealing and guiding a filter element in a receiving shaft, wherein the filter element circumferential seals in a corresponding receptacle on the housing rich and protrude from the housing protruding seals in receiving areas of the filter element. DE 10 2009 059 782 B4 shows a filter element with a laterally mounted mechanical coding with a coding profile of steps and / or valleys, which engage in the manner of a key-lock principle in correspondingly shaped housing contours.

The conventionally pursued seal has the disadvantage, in particular with vertically installed filter elements, that either liquid collecting at the bottom of the housing can either not drain off or is absorbed by the filter medium. This can be undesirable for hygienic reasons.

Disclosure of the invention

Against this background, the present invention has the object to provide an improved filter element.

Accordingly, a filter element with a fold pack is proposed which comprises a zigzag-folded filter medium. The fold pack is disposed between a first and a second sideband. At least one spacer element for spacing the first sideband from a filter housing-side contact surface is attached to the first sideband.

Furthermore, a filter element with a fold pack is proposed, which comprises a zigzag-folded filter medium. The fold pack is disposed between a first and a second sideband. At least two spacer elements for spacing the first sideband from a filter housing-side contact surface are attached to the first sideband. The filter element is designed in particular as an interior air filter element for cabin air of a motor vehicle.

In the proposed filter element result from the sidebands on the one hand smooth surfaces and simple geometries. As a result, the handling and the installation or replacement of the filter element is facilitated as a consumable part.

The spacer or the at least two spacer elements cause there to be a gap between the first sideband and the filter housing. In particular, when the filter housing side bearing surface is horizontal, condensation can collect and drain in the gap. By at least two spacer elements a secure hold of the filter element is made possible in the housing.

In embodiments, the filter element is configured cuboid, so it can be used modularly with other similar filter elements. This allows the filter surface to be adapted to the respective applications.

Spacers also allow the use of the filter element in various sized filter housings with a firm grip. Spacer elements can be made such that rattling noises are avoided. For example, a contact pressure from a contact surface on the folded filter medium and / or the sidebands is transmitted through the spacer elements.

The filter element comprises, for example, a filter medium and one or more stabilizing elements, in particular the two sidebands and / or headbands (also referred to as headbands), which stabilize the filter medium at least in sections, in order to maintain its shape, in particular in filter operation. The stabilizing elements can in particular form a closed or open frame - also in one piece of material - which surrounds the filter medium.

The stabilizing elements can be connected to the filter medium at the edge cohesively, in particular glued. For this purpose, the stabilizing elements can be heated and the filter medium can be pressed into the heated material. Alternatively, the stabilizing elements may be molded onto the filter medium. Furthermore, an adhesive can be used as filler material. The stabilizing elements may themselves be made of the same material as the filter medium. Alternatively, the stabilizing elements may be formed as plastic injection molded components. The stabilizing elements can be stiff or flexible.

The filter medium can be folded or wave-shaped. As convolutions zigzag or W-folds are known, for example. The filter medium can be embossed and then folded sharp-edged at embossing edges to form folding edges. As a starting material can serve a sheet material filter sheet, which is transformed accordingly. The filter medium is, for example, a filter fabric, a filter fabric or a filter fabric. In particular, the filter medium can be produced in a spunbond or meltblown process. Further, the filter medium may be felted or needled. The filter medium may include natural fibers such as cotton or synthetic fibers such as polyester, polyphenylsulfide or polytetrafluoroethylene. The fibers may be oriented in, skewed and / or transversely to the machine direction during processing.

The filter medium can be single or multi-layered. It may further comprise an adsorbent such as activated carbon. Furthermore, the filter medium may have an antimicrobial and / or antiallergenic effect. As antimicrobial material is, for example, zinc pyrithione or nanosilver, as an anti-allergenic substance such as polyphenol into consideration.

A corresponding filter element serves to filter fluids, ie gaseous and / or liquid media, for example air. A gaseous medium or air here also includes gas or air-solid mixtures and / or gas or air-liquid mixtures. For example, an air conditioner may have the filter element.

A particularly open filter medium may be adapted to trace particles of the test dust A4 ISO 12103-1 from an air stream with a filtration speed of 0.10 to 0.30 m / s, based on the filter medium surface, with an air permeability of greater than 3000 l / m ² s (determined according to ISO 9237 at 200 Pa). The determination of the filtration characteristics can, for example, according to DIN 71460-1 respectively.

A particularly highly separating filter medium can be adapted to after particles of the test dust A2 after ISO 12103-1 and NaCl aerosol particles according to DIN 71460-1 from an air stream with a filtration speed of 0.10 to 0.30 m / s, based on the filter medium surface, with an air permeability of greater than 600 l / m ² s (determined according to ISO 9237 at 200 Pa) to remove. The determination of the filtration characteristics can, for example, according to DIN 71460-1 respectively.

The filter element may have a seal which seals a raw side associated with the filter element with respect to a clean side thereof. The seal may be identical in construction to one or more stabilizing elements of the filter element. Alternatively, the seal may be formed as an additional component. For example, the seal may be attached to the filter medium, the one or more stabilizing elements, the filter element or the filter holder.

The filter element can be fixed exchangeably in the filter holder.

The filter element or the filter assembly can be found in passenger cars, trucks, construction machinery, watercraft, rail vehicles, aircraft and generally in air conditioning, especially in air conditioning appliances, household appliances, fuel cells or in building services application. These cars or vehicles can be operated electrically and / or by means of fuel (in particular gasoline or diesel). In terms of building technology, in particular stationary systems for the treatment of air come into consideration.

In embodiments, the first and second sidebands are attached to fold profiles of the fold pack. As a result of the folds, the filter element as a rule has stronger strength along the folds than transversely to the fold. The attachment of spacers is so far cheaper on a sideband than on a headband or headband.

In embodiments, the cabin air filter is disposed vertically, ie vertically, in a filter housing when used as intended. Spacer elements are then on a filter housing side soil as a contact surface.

In embodiments, the second sideband is free of spacers. D. h., In a cuboid cabin air filter element only one of the four sides is provided with spacers. If the spacer elements are exclusively on the first sideband, simple sealing geometries can be achieved on the second sideband or additional, conventional cabin air filter elements can be arranged.

In embodiments, the spacer elements have a thickness such that the filter housing-side contact surface and the outer side of the first sideband have a distance between 1 and 5 mm in the installed state. In embodiments, the distance is between 1 and 2 mm. It is Z. B. conceivable that the spacer elements have a thickness between 1 and 7 mm. In embodiments, the thickness is 1 and 5 mm.

It is possible that the spacers are offset from an outer edge of the first sideband in the direction toward the center of the first sideband. This makes it possible that at the edges of the sideband additional sealing means can be provided on the filter element. Legs from the sideband material, for example, come into question as sealing means, but it is also possible that the filter element is surrounded by a frame which is formed from a sealing material.

The areal extent of the spacer elements is preferably smaller than the width of the sideband or the height of the folds in the fold pack. It is possible to carry out the spacer elements separately, which facilitates the production.

In embodiments, at least one spacer element is designed as a round plastic disk or a cylinder. Round discs or plates are easy to handle and position, so that the manufacture of the interior filter element is facilitated. Of course, half cylinders or hemispheres are also possible.

In embodiments, at least one spacer element is designed as a rectangular plastic plate. With the help of rectangular plates or in the manner of cuboids can be made, for example, of strips of material spacers, which are attached to the sideband.

In embodiments, at least one spacer is implemented as a hot melt adhesive point. It is Z. Example, possible to apply in the manufacture of the filter element used hot melt adhesive at the intended locations for the spacers. The hot melt adhesive, which is also referred to as hot melt, can be formed from a polyolefin, can be processed well and leads to a good build of the resulting filter element. Also conceivable is the use of polyamides as hotmelt point.

In embodiments, a polyurethane foam material is used to form the spacer. In this case, in particular closed-cell PU foam is used. Corresponding spacer elements can be prefabricated and glued to the sideband. However, it is also conceivable direct foaming or foaming of a starting material for polyurethane foam.

In embodiments, a rubber material is used for the spacer. Rubber material is easy to process and has an adjustable plasticity, so that rattling of the built-in filter element can be easily prevented.

It is also possible to manufacture the spacer elements from a two-component material.

In embodiments, the spacers are not nondestructively removable from the sideband.

In embodiments, at least one spacer element is designed as a clamping element encompassing at least partially the first sideband. That is, the spacer may be slid in the manner of a clip on the sideband between pleats. By a corresponding removability of the spacer element, the filter element can be used flexibly, namely without spacers.

In further embodiments, at least one spacer element is attached to the side material by means of a hook-and-loop fastener.

In further embodiments, at least one spacer element is fastened by means of a pin element extending into or through the sideband material. It is conceivable alternatively or additionally also an adhesion of the spacers with the sideband material.

The spacer elements are preferably fastened to the first sideband in such a way that fluid absorption by the sideband material is prevented by fluid present on or on the support surface. In particular, the spacer elements are made of a material which prevents fluid absorption of the sideband material.

In embodiments, the spacer elements are made of a water-resistant material, so that water applied to the abutment surface is not absorbed into the sideband material by capillary forces. In particular, in vertical installation, so if the spacer elements rest on a bottom surface of the associated housing, a drainage of condensation water is achieved by the spacing.

Furthermore, a filter arrangement with a filter housing for accommodating at least one cabin air filter element as described above and below is proposed. The filter assembly has a filter housing having a first inner housing wall that includes cantilevered ribs. The filter assembly includes an interior air filter element as described above and below, wherein the cabin air filter element is received in the housing such that the spacers either rest on the ribs or the spacers abut in regions between the ribs on the inner housing wall or on less projecting ribs.

In an alternative embodiment, the housing wall is smooth, so that, for example, a drainage region for condensate between the first sideband and the contact surface is formed. The contact surface can also be formed by ribs, so that an increased drainage volume is formed, for example, with channels formed by the ribs.

In embodiments, the inner housing wall is horizontal. This is also referred to as standing interior air filter elements in the respective vehicle.

In yet another embodiment of the filter assembly, the filter assembly includes another cabin air filter element having a fold pack with a zig-zag folded filter medium disposed between two equal sidebands. The second sideband and one of the same sidebands of the further cabin air filter element then lie against one another.

For example, the two cabin air filter elements can be inserted into a filter housing in the manner of a shaft, wherein the first cabin air filter element is provided with the sideband and its spacers below. Preferably, both cabin air filter elements are cuboid. The side bands are preferably smooth and are preferably made of a nonwoven material. In embodiments, the sidebands and / or the headbands of the filter element are free of sealing contours. A smooth sideband course is understood to mean that there is no deformation such as bending or folding. The surface roughness of the sideband results from the material itself.

Further possible implementations of the invention also include not explicitly mentioned combinations of features described above or below with regard to the exemplary embodiments. The skilled person will also add individual aspects as improvements or additions to the respective basic form of the invention.

Further embodiments of the invention are the subject of the dependent claims and the embodiments of the invention described below. Furthermore, the invention will be explained in more detail by means of embodiments with reference to the accompanying figures.

Brief description of the drawings

It shows:

1 a schematic representation of a general motor vehicle with a filter assembly;

2 a perspective view of the filter assembly 1 a filter housing having an interior air filter element received therein;

3 a perspective view of the cabin air filter element 2 comprising a frame and a filter medium;

4 in a perspective view of the filter medium as a fold pack 3 ;

5 - 7 a first embodiment of an indoor air filter element in a perspective view, a side view and in plan view;

8th a second embodiment of an indoor air filter element in a perspective view;

9 an embodiment of a spacer element for an indoor air filter element according to 8th in a perspective view;

10 a partial sectional view of a filter assembly with an interior air filter element according to 8th ;

11 - 13 a third embodiment of an indoor air filter element in a perspective view, a side view and in plan view;

14 a further embodiment of a filter assembly comprising a filter housing with an interior air filter element received therein; and

15 and 16 schematic representation for explaining yet another embodiment of a spacer element.

In the figures, identical or functionally identical elements, unless otherwise indicated, have been given the same reference numerals.

Embodiment (s) of the invention

1 shows a motor vehicle 1 with air conditioning 2 which can be designed as a heating air conditioning. The air conditioner 2 takes outside air 3 on and leads filtered air 4 a cabin 5 (Also referred to as passenger compartment) of the motor vehicle 1 to. For this purpose, the air conditioning system includes 2 one in 2 shown filter assembly 6 ,

The filter arrangement 6 includes a filter housing 7 with an interior air filter element accommodated therein, in particular exchangeable 8th , The cabin air filter element 8th is in 3 shown in more detail and is also referred to simply as cabin air filters. The cabin filter 8th has a filter medium 9 on which in particular round with a frame 10 connected is. The frame 10 can, for example, sidebands 11 . 12 and headbands 13 . 14 include.

The filter medium 9 is in 4 shown isolated. The filter medium 9 is for example a filter fleece, filter fabric, filter fabric or filter felt, in particular a needle felt. In particular, the filter medium 9 be prepared in a meltblown process. The filter medium 9 may comprise natural fibers, such as cotton, or synthetic fibers, for example of polyester, polyphenylsulfide or polytetrafluoroethylene. The fibers may be oriented in, obliquely and / or transversely to the machine direction M during processing. Also, the fibers may be stretched in one spatial direction. The filter medium 9 can be formed in one or more layers.

The filter medium 9 can wrinkles 15 which typically extend across the machine direction M. The folded filter medium is also called plissée. The wrinkles 15 can by means of folding along sharp fold edges 16 (Also referred to as pleat tips) or by a wavy design of the filter medium 9 be generated. A respective fold 15 can through two folding sections 22 be defined, which has a corresponding folding edge 16 connected to each other. The fold edges 16 can in this case in a plane which is perpendicular or oblique to the direction of flow, which in 2 is indicated by the arrow L, be formed differently. The folding can be carried out in particular as a zig-zag folding.

Also a fold in which the wrinkles 15 have a varying height H is possible. Further, the pleat spacing between the pleats 15 vary so that the distance A1 is not equal to the distance A2. The filter medium 9 can be self-supporting, ie the wrinkles 15 are dimensionally stable at a proper flow in the filter operation.

The filter medium 9 is in the machine direction M of final folds 17 . 18 limited. Transverse to this is the filter medium 9 of pleated front edges 19 . 20 (also referred to as folding profiles) limited. By "wrinkle front edge" is meant the frontal fold surface, which is located between adjacent fold edges 16 a respective fold 15 extends.

The filter medium 9 can have a rectangular shape in the plan view, ie in the plane E of its planar extension. However, a triangular, pentagonal or polygonal, round or oval shape is conceivable.

In the 3 shown sidebands 11 . 12 are with the fold end edges 19 . 20 , the headbands 13 . 14 with the endfolds 17 . 18 connected, in particular by fusing, welding or gluing. The sidebands 11 . 12 as well as the headbands 13 . 14 can the frame 10 form one-piece or multi-part. The sidebands 11 . 12 as well as the headbands 13 . 14 For example, they can be made of a particularly flexible fiber material or, in particular, of rigid plastic injection-molded components. In particular, the frame may 10 by injection molding on the filter medium 9 be generated.

The filter medium 9 can act as a particle filter while particles, especially dust, suspended solids or liquid drops, from the intake air 3 filter out. In addition, the filter medium 9 act as an odor filter. For this purpose, it may, for example, have a layer of activated carbon. The filter medium 9 can do this in general be set up to absorb or adsorb certain solid, liquid and / or gaseous substances.

In filter operation, the filter medium 9 , as in 2 shown, flows through perpendicular to its planar extent of air L. The air L flows from a raw side RO of the cabin air filter 8th towards a clean side RE of the same.

To ensure a sufficient seal between the raw and clean side RO, RE, a seal between the cabin air filter 9 and the filter housing 7 be provided. For example, the seal can be in the frame 10 be integrated. In this case, the frame is 10 at least partially formed of a sealing material. Alternatively, the seal may be provided as an additional part, for example on the frame 10 attached, in particular be injected. Such a seal 21 is exemplary and partial in 3 shown.

In 3 is also a contact surface 21 indicated, to which the first sideband 11 is spaced by the distance d. A well-defined distance may result from the size of the housing or because a clearance is desired for other reasons. This can, in 3 through the back sideband 11 concealed, spacers or spacers are provided.

In the following filter elements and filter arrangements are shown, which have suitable spacers on at least one sideband. 5 to 7 show a first embodiment of an indoor air filter element, which has substantially the same elements as in 3 are shown. 5 shows a perspective view of the filter element 100 . 6 a side view of a sideband with spacers, and 7 a plan view of the cuboid fold pack 9 of the filter element 100 ,

The filter element 100 includes the fold pack 9 and two sidebands 11 . 12 on the folding profiles 19 the fold pack 9 are attached. Further, a rectangular headband 14 - in the orientation of 5 to 7 - arranged right and a two-legged headband 13 on the left. The headband 13 has a first wide thigh 23 that with the sidebands 11 . 12 closes the frame and a second leg 24 , which can be used for example for sealing or handling of the filter element. In 6 on the left is a view of the folding profiles 19 exposed. The folding profiles 19 arise from the zigzag folded filter medium. The filter medium is designed, for example, multi-layered, resulting in the more wavy kinks or folds.

The filter element encloses a substantially cuboidal volume, wherein, as in 7 is shown, the fold pack 9 along with the frame from the side and head bands 11 - 14 form a rectangular cross-section. To be the first with 11 designated sidewall 11 or the entire filter element 100 opposite a contact surface 27 (see. 7 ) to space and support, are two spacers 25 and 26 on the first sideband 11 intended. The spacers 25 and 26 have z. B. a thickness of a few millimeters and are manufactured as plastic plates. As a plastic plate or material z. As a PUR foam in question, which solidifies in the production.

One recognizes in the side view the 6 that the two spacers 25 . 26 symmetrical to the midline 10 of the sideband 11 are arranged. In this respect, two equally spaced spacer elements arise 25 and 26 coming from an upper edge 11B and a bottom edge 11A of the sideband 11 offset to the center are attached. Ie. the extent of the spacer elements 25 . 26 is significantly lower than that of the sideband 11 , For example, the sideband has 11 and thus the filter element 100 a longitudinal extent of 20 to 25 cm. A height H of the filter element 100 is for example 3 to 5 cm. In embodiments, the width B is about 10 to 15 cm. By a distance d of about 1 to 2 mm over the extension of the sideband 11 to achieve the spacers have a thickness of about 3 to 5 mm.

The areal extent of the spacer elements 25 . 26 as they are in 6 are visible, z. B. 3 to 4 cm by 2 to 3 cm. The sideband material is z. B. made of a fluffy nonwoven material, so that in the particular installation situation, the spacer elements 25 and 26 something in the sideband 11 Push. That is, when installed, the filter element 100 between the sidebands 11 and 12 clamped by respective mating surfaces on the filter housing. As a result, an improved sealing effect is achieved at the edges.

In 7 one recognizes that, for example, in a vertical installation situation, the filter element 100 with the help of spacer elements 25 . 26 , which can also be referred to as distance feet, on the contact surface 27 rests.

Through the gap d z. B. ensures a reliable drainage. Be the spacers or feet 25 . 26 Made of a waterproof material is prevented by this on the contact surface 27 present water in the sideband material 11 penetrates. That is, through the spacers 25 . 26 an improved drainage during installation is achieved. In addition, can by a variation of the thickness of the spacer elements 25 . 26 a fold pack 9 given size can be used in different cases. In this respect allows a filter element 100 with spacers 25 . 26 a more flexible application of the same in different installation spaces.

The filter element 100 is particularly suitable for filter housings in which the filter elements 100 standing, so vertical, are arranged and a ground or contact surface 27 has virtually no inclination.

The 8th . 9 and 10 show a second embodiment of an indoor air filter element 101 and a filter assembly 106 , In 8th is a perspective view of a filter element 101 shown. Again one recognizes one from a first sideband 11 , a second sideband 12 and two headbands 13 enclosed fold pack 9 , At the viewer facing side is on the first sideband 11 a first and second spacer element 28 arranged. The spacers 28 are made, for example, of rubber or plastic squares, with the help of pins on the sideband 11 are attached.

9 shows a detail view of in 8th selected embodiment for a spacer 28 , The spacer element 28 has a basic body 29 , which is designed in the manner of a flat cuboid of thickness D. At the sideband 11 facing side are two nail or pin-shaped pins 30 provided with hooking 43 are provided. The re-hook 43 engage in the installed state, the sideband 11 ,

10 shows a cutaway view of a filter assembly 106 with a filter housing 7 and a filter element received therein 101 , The filter housing 7 has a horizontal housing wall when used as intended 21 as a contact surface. The horizontal is in 10 denoted by K. The filter element 101 is arranged standing, leaving the sideband 11 spaced from the support surface 21 is present. The spacing is over in 8th and 9 shown spacers 28 , This is the body 29 on the support surface 21 at. The main body 29 is molded, for example, from a molded plastic material, an elastomer or rubber.

The pencil 30 pierces the sideband 11 and is by the barb 43 firmly connected to this. The pencil 30 runs parallel to the folds of the fold pack 9 ,

By in the sectional view of 10 visible spacing arises between the sideband 11 and the housing 7 a narrow cavity 31 , Through this cavity 31 For example, condensate can be removed. In this respect, the cavity acts 31 as a drainage. Transverse to the surface of the fold pack 9 a seal with the help of vertical housing wall sections 44 and the sideband 11 yourself. A similar installation situation arises when using the in 5 to 7 indicated filter element 100 ,

11 to 13 show a third embodiment of an indoor air filter element in perspective, in side view and in plan view. At the in 11 to 13 shown filter element 102 are the spacers 32 made of round plates or flat cylinders. One recognizes in 11 in the perspective view of the cuboid filter element 102 with two sidebands 11 and 12 as well as headbands 13 . 14 and the intermediate fold pack 9 , The presentation essentially corresponds to the 8th , The round spacers 32 are z. B. on the sideband 11 glued. For this purpose, a two-component adhesive or other adhesives known for filter production can be used.

The round shape of the spacers 32 can be z. B. also achieve by applying hotmelt points. Hotmelt adhesives are already used for example in attaching the sidebands to the folding profiles, so that on the one hand due to the already existing material mixes and on the other hand, the flexibility of the cured hot melt adhesive, favorable spacers can be made.

13 shows a detailed view of a filter assembly 107 with the filter element 102 out 11 and 12 , It is a housing wall 21 represented, the projecting ribs 33 . 34 includes. These are higher or more projecting ribs 34 and less cantilevered ribs 33 intended. Between the respective ribs 33 . 34 This creates drainage channels for condensed water. The lower cantilevered ribs 33 form a bearing surface 27 at which the spacers 32 issue. The more prominent ribs 34 provide an offset contact surface 27 ' for the sideband 11 , In the in 13 shown installation situation are areas 35 ago, in which the lower-protruding ribs 33 available. In these areas 35 grab the spacers 32 one.

14 shows a further embodiment of a filter assembly 108 with a filter housing and therein housed indoor air filter elements. In 14 is a plan view shown, wherein the filter housing a lower housing part 37 and an upper housing part closing this 38 includes. The filter housing can be used as a shaft for receiving two filter elements be understood. In the orientation of 14 below is a contact surface 27 from the horizontal housing wall 21 educated.

A first filter element 100 , for example, in the nature of 5 , lies under a second filter element 36 in front. The spacers 25 . 26 on the sideband 11 the first cabin air filter element 100 store on the contact surface 27 , The second cabin air filter element 36 has only one fold pack 9 that of two sidebands 11 ' . 12 ' is surrounded. The sideband 11 ' and the second sideband 12 of the first filter element are adjacent to each other or to each other. When installing or replacing the filter elements 100 . 36 there is a slot in the mounting direction, which is designated W. First, in the shaft, through the lower housing part 37 is formed, a filter element 100 with spacers 25 . 26 introduced. On it is a filter element 36 without spacers on sidebands 11 ' . 12 ' introduced, whereupon the lid or the upper housing part 38 can be closed.

The two filter elements 100 . 36 together form the filter surface. It is advantageous, for example, only one of the filter elements 100 . 36 with spacers 25 . 26 because the second in the orientation of the 14 above present filter element 36 not with potential in the drainage room 31 this condensation comes into contact. Overall, a reliable filter arrangement results.

15 shows yet another embodiment for spacers 39 which can be attached to a sideband. In addition to the non-destructively removable spacer elements described above can be done for example via Velcro fasteners or clips or clamps. In 15 is such a clip or a clip as a spacer 39 shown.

In the orientation of 15 from the left the fold pack reaches 9 to the sideband 11 , The sideband 11 has a lower edge 11A and an upper edge 11B , The spacer element 39 now has two clip sections 40 covering the top and the bottom 11B . 11A of the sideband 11 embrace. On the side of the fold pack 9 grab the clip sections 40 between the folding profiles 19 , This is in 16 indicated. The dotted curves correspond to the fold profiles 19 , and the bodies 42 indicate areas where the clip sections 40 can intervene.

On the respective contact surface facing side surface of the sideband 11 is a distance section 41 the desired thickness provided. The spacer element 39 as it is in 15 or 16 is indicated, can be used instead of the spacers described in the previous figures. The clamped spacer 39 has the advantage that it is removable and therefore can be attached to conventional cabin air filter elements. Through the clip sections 40 Furthermore, a stabilization of the wrinkle profiles can be achieved.

Although the present invention has been described in detail with reference to preferred embodiments, it is not limited thereto, but variously modifiable. In the present case, "a" does not exclude a large number.

LIST OF REFERENCE NUMBERS

1

motor vehicle

2

air conditioning

3

outside air

6

A filter assembly

7

filter housing

8th

Cabin air filter element

9

Filter medium, fold pack

10

frame

11, 12

sideband

11A, 11B

edge

13, 14

headband

15

wrinkles

16

fold

17, 18

end folds

19, 20

folded profile

21

housing wall

22

folding section

23, 24

leg

25, 26

spacer

27

contact surface

28

spacer

29

body

30

pen

31

cavity

32

spacer

33

rib

34

rib

35

Area

36

Cabin air filter element

37, 38

housing part

39

spacer

40

bracket portion

41

spacer section

42

Faltzwischenraum

44

vertical housing wall

100

Cabin air filter element

101

Cabin air filter element

106

A filter assembly

107

A filter assembly

108

A filter assembly

A1, A2

pleat spacing

B

width

C

center line

d

distance

D

thickness

e

level

H

pleat height

K

horizontal

L

flow direction

M

machine direction

RE

clean side

RO

unfiltered side

W

insertion direction

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

• DE 102014002647 A1 [0006]
• DE 102009059782 B4 [0006]

Cited non-patent literature

• ISO 12103-1 [0020]
• ISO 9237 [0020]
• DIN 71460-1 [0020]
• ISO 12103-1 [0021]
• DIN 71460-1 [0021]
• DIN 71460-1 [0021]

Claims (10)

Interior air filter element ( 100 ) with a fold pack ( 24 ), which has a zig-zag folded filter medium ( 9 ), wherein the fold pack ( 9 ) between a first ( 11 ) and a second sideband ( 12 ), and wherein at the first sideband ( 11 ) at least two spacer elements ( 25 . 26 ) for spacing the first sideband ( 11 ) of a filter housing side contact surface ( 27 ) are mounted. An interior air filter element according to claim 1, wherein the first and second sidebands (FIGS. 11 . 12 ) on folding profiles ( 19 ) of the fold pack ( 9 ) are attached. Interior air filter element according to claim 1 or 2, wherein the second sideband ( 12 ) free of spacer elements ( 25 . 26 ). Interior air filter element according to one of claims 1 to 3, wherein the spacer elements ( 25 . 26 ) from an outer edge ( 11A . 11B . 11C . 11D ) of the first sideband ( 11 ) towards the center (C) of the first sideband ( 11 ) are arranged offset. Interior air filter element according to one of claims 1 to 4, wherein at least one spacer element as round plastic disc or cylinder ( 32 ), as a rectangular plastic plate ( 28 ), as a hot melt adhesive point, is made of a polyurethane foam material, a rubber material and / or a two-component material. Interior air filter element according to one of claims 1 to 5, wherein at least one spacer element as at least partially the first side band ( 11 ) encompassing clip element ( 39 ) is carried out with the aid of a hook-and-loop fastener, a pin element extending into or through the sideband material ( 30 ) and / or to the first sideband ( 11 ) is glued. Interior air filter element according to one of claims 1 to 6, wherein the spacer elements ( 25 . 26 ) at the first sideband ( 11 ), that a liquid absorption by the side band material from on or on the contact surface ( 27 ) present liquid, in particular via the spacer elements ( 25 . 26 ), is prevented. Filter arrangement ( 106 ) with a filter housing ( 7 ) for receiving at least one cabin air filter element ( 102 ) according to one of claims 1 to 7, with an inner housing wall ( 21 ), which projecting ribs ( 33 . 34 ), and with an interior air filter element ( 102 ) according to one of claims 1 to 7, wherein the interior filter element ( 107 ) in the filter housing ( 7 ) that the spacer elements ( 32 ) either on the ribs ( 33 ) or the spacer elements ( 32 ) in areas ( 35 ) between the ribs ( 34 ) on the inner housing wall or on less projecting ribs ( 33 ) issue. Filter assembly according to claim 8, wherein the inner housing wall ( 21 ) runs horizontally. A filter arrangement according to claim 8 or 9, wherein the filter arrangement comprises a further cabin air filter element ( 36 ) comprising a fold pack ( 9 ) with a zig-zag folded filter medium, which is arranged between two equal sidebands ( 11 ' . 12 ' ), wherein the second sideband ( 12 ) and one of the same sidebands ( 11 ' . 12 ' ) abut each other.

Images