DE102014112535B4 - Motor vehicle air conditioning system with detachably connected filter cover - Google Patents

Abstract

Motor vehicle air conditioning system (1), comprising - a housing (10-14) with an air-conducting duct system, - a fan which is arranged in the air-conducting duct system, - a filter assembly space (12) which is suitable for receiving an air filter in the air-conducting duct system, - a Filter opening (18) provided below the filter assembly space (12) through which an air filter can be inserted or an inserted air filter can be removed, - a filter cover (30) releasably connected to the housing (10-14), by means of which the filter opening (18) can be closed , the filter cover (30) being designed in the shape of a trough for collecting water, - a first water drainage channel (16) which is connected to the air-conducting channel system and via which water in the air-conducting channel system via the filter cover (30) from the housing (10 - 14) can be derived, - wherein the housing (10-14) comprises a second water drainage channel (17), and - the second water drainage channel (17) through at least ns a section of a housing inner wall (14) is formed with a passage (19) to the housing outer wall, characterized in that an outlet connection (32) is provided on the filter cover (30) which can be attached to the passage (19) at an angle from below, wherein the passage (19) supports the outlet connector (32) from below and the outlet connector (32) opens into the second water drainage channel (17), and the passage (19) and the filter opening (18) by pivoting the filter cover (30) upwards from are tightly closable on the outside.

Description

The present invention relates to a motor vehicle air conditioning system with a filter opening and a filter cover in order to enable the replacement of the air filter in the motor vehicle air conditioning system.

Motor vehicle air conditioning systems suck in air from the environment during operation. The sucked in air is filtered by an air filter and conditioned according to the passenger's wishes, i.e. cooled or heated accordingly and dehumidified in the process. With the sucked in air, moisture, e.g. through rain or snow, can get into the air duct system, which has to be diverted accordingly from the air conditioning system. Due to installation space requirements and weight reduction, an effort is made to make the housing for the air-conducting duct system as compact as possible. These installation space requirements have an unfavorable effect on the effectiveness of the water drainage. Furthermore, other requirements for easy maintenance, e.g. for replacing the air filter, must be met. If the air filter opening is accessible from the passenger cabin, it must be ensured, in particular by means of sealing measures, that no moisture penetrates into the footwell of the passenger cell.

Generic motor vehicle air conditioning systems include a housing with an air-conducting duct system, a fan which is arranged in the air-conducting duct system, and a filter installation space which is suitable for accommodating an air filter downstream or upstream of the fan in the air-conducting duct system. To replace the air filter, a filter opening is also provided below the filter mounting space, through which an air filter can be inserted or an inserted air filter can be removed. A filter cover detachably connected to the housing, by means of which the filter opening can be closed, is designed in the shape of a trough for collecting water, with water, in particular spray water from the outside, in the air-conducting channel system being diverted from the housing via the filter cover via a water drainage channel.

In the DE 10 2011 007 754 A1 A motor vehicle air conditioning system of the generic type is described which is equipped with a water-discharging filter cover which can be connected to the housing and also detached again by an essentially horizontal movement. Another similar solution is from the DE 10 2009 009 065 A1 known.

Due to the installation space situation, a horizontal movement of the filter cover for connecting to or detaching from the housing can be disadvantageous, especially if the installation space around the filter opening is occupied by other housing parts or the vehicle interior trim.

It is the object of the present invention to provide an alternative filter cover concept which meets the aforementioned requirements of water drainage and which makes good use of the degrees of freedom available through the installation space with regard to opening and closing the filter cover. In addition, a filter cover concept designed in this way should be inexpensive and easy to maintain.

This object is achieved by a motor vehicle air conditioning system according to claim 1 and by a motor vehicle with such an air conditioning system according to claim 10. Advantageous training and further developments result from the dependent claims.

The motor vehicle air conditioning system according to the invention provides that the housing includes a second water drainage channel in addition to the (first) water drainage channel already mentioned at the beginning, the second water drainage channel being formed by at least one section of an inner wall of the housing with a passage to the outer wall of the housing. The motor vehicle air conditioning system according to the invention is characterized in that an outlet connector is provided on the filter cover, which can be attached to the passage at an angle from below, the passage supporting the outlet connector from below and the outlet connector opening into the second water drainage channel. The section of the housing inner wall with the passage and the filter cover are adapted in such a way that the passage and the filter opening can be tightly closed from the outside by pivoting up the filter cover. The passage in the housing wall, together with the outlet nozzle, forms a pre-fixation that can be conveniently attached at an angle from below without slipping off.

The pre-fixation can, for example, also be formed by a shoulder on the underside of the outlet nozzle, which is hung on the inner wall of the housing at the lower edge of the outlet. The inclined attachment from below makes good use of the installation space in particular if the filter opening is to be accessible on the passenger compartment side to change the filter, e.g. through the leg space below the glove compartment in front of the passenger seat. The leg free space can then be available both for pivoting the filter cover and for removing or inserting the air filter through the filter opening.

The tightness of the arrangement of the filter cover on the housing relates in particular to airtightness. There is no watertightness here Absolutely necessary because, due to the trough-shaped structure of the filter cover, the drainage through the outlet nozzle, the connection between the filter cover with the outlet nozzle on the one hand and the housing parts around the filter opening and the passage on the other hand does not come into contact with the outflowing spray water if dimensioned accordingly. For particularly high requirements, e.g. for extreme conditions caused by off-road driving, an additional seal can be installed if necessary. However, this is not required for normal road use.

In the case of the solution according to the invention, when the filter cover is pivoted up, it closes the filter opening, with the outlet connection simultaneously closing the passage between the housing inner wall and the housing outer wall. The attachment to the distal end of the filter cover, i.e. to the end opposite the outlet connection, then takes place in a manner known per se, for example by means of a catch or a screw connection.

Typically, the first water drainage channel is formed downstream of the fan in the air-conducting channel system and in particular collects water that has penetrated from the outside, e.g. splash water, in order to discharge it via the filter cover. The second water drainage channel is typically designed to collect and discharge in particular condensed water from the evaporator. The outlet connection now enables both water drainage channels to be brought together integrally in the housing of the air-carrying channel system without external connecting hoses. This is typically done in an area next to or below the evaporator, through which condensation water is generated to a greater extent when the air is dehumidified.

Typically, the filter cover and the filter opening are elongated. The passage is then preferably arranged as an extension to the narrow side of the filter opening and the outlet connection is then provided on the narrow side of the filter cover in the longitudinal direction. This enables a connection of the outlet connection to the passage that is as straight as possible and is simple to produce, which also makes it easier to open and close the filter cover without tilting. Filters of other designs and correspondingly adapted filter openings and filter covers are also conceivable.

According to preferred embodiments of the invention, the outlet connector has a rectangular or U-shaped cross section. As an alternative or in addition, the outlet connection is open at the top in the installation position. A component that is open at the top can be produced with a simpler tool and in a simplified injection molding process. In particular, the entire filter cover with the outlet nozzle can be produced in one piece without connecting parts. This is not only more cost-effective, it also does not require a seal between the outlet nozzle and the filter cover. In addition, the outlet connection rests tightly against the housing in the assembled state, so that for these reasons there is no need for an additional upper limit.

It is also preferably provided that the underside of the outlet connection and / or of the filter cover in the installed position is formed by a channel which is inclined downward at a slight angle in the outlet direction. This avoids residual water remaining in the filter cover and in the outlet connection. Furthermore, an improved drainage of the water is made possible in the case of a surge of water entering. A small angle within the meaning of the invention means an inclination such that water can flow off under its own weight despite adhesive forces without flowing out in a turbulent or sudden manner. Depending on the profile and dimensions of the outlet connection, such angle ranges are between 1 ° and 10 °, more preferably between 2 ° and 5 °.

According to one embodiment of the invention, stop means are provided on the outlet connector, which pre-position the filter cover when the outlet connector is placed in the passage so that the filter opening can be closed by pivoting it up around the stop point. This further simplifies the insertion of the filter cover. The stop means can be formed by a small protrusion on the underside of the filter cover. As an alternative or in addition, the stop means can also comprise a hinge.

According to a preferred embodiment of the invention it is provided that the free end of the outlet stub protrudes into the second water drainage channel when the filter cover is installed and drip means are formed at the free end of the outlet stub into the second water drainage channel. These are formed, for example, by at least one drip nose projecting downward into the second water drainage channel. Alternatively, a drip edge can also be formed. These dripping agents ensure that the water does not drip off directly at the connection point between the passage and the outlet nozzle, so that additional sealants can be dispensed with in this joint area. The back of the drip nose can simultaneously serve to rest against the inside wall of the housing.

The connection between the filter cover with the outlet connection on the one hand and the area around the filter opening and / or the area around the passage is preferably designed as a tongue and groove connection. Preferably are there Housing and filter cover made of the same plastic, with no further sealing elements or sealants being used in the tongue and groove connection. Furthermore, it can be provided in particular that drip noses are provided on the housing in the region of the filter opening, which are arranged within the cross section of the filter opening and at a distance from the tongue and groove connection. Tests have shown that, due to the design of the filter cover and the housing according to the invention, such an additional sealing measure can be dispensed with and there is no water leakage from the connection area between the filter cover and the filter opening / housing.

In a further development of the invention it is provided that a rib structure running in the longitudinal direction is formed in the filter cover, which is in physical contact with the air filter when the filter cover is installed. The rib structure can be formed from a single or multiple parallel ribs or a labyrinth of ribs that contact the air filter on its underside and represent a barrier for the air coming from the fan so that the air cannot pass below the filter. The water can then flow parallel to the ribs below the air filter to the outlet connection.

According to the invention, a motor vehicle is equipped with an air conditioning system as described above, the filter opening which can be closed by the filter cover being arranged in particular above the footwell of the passenger seat. Here, the advantages of the opening direction unfold best through a vertical pivoting movement of the filter cover.

• Die 1 zeigt eine perspektivische Ansicht einer unteren Gehäusehälfte eines luftführenden Kanalsystems für eine Kraftfahrzeugklimaanlage mit einem lösbar verbundenen Filterdeckel gemäß dem Ausführungsbeispiel der Erfindung,
• die 2 zeigt eine Draufsicht der in der 1 dargestellten unteren Gehäusehälfte mit Filterdeckel einschließlich einer Erläuterung des Wasserablaufkonzepts gemäß der vorliegenden Offenbarung,
• die 3 zeigt eine Schnittansicht durch den in der 2 dargestellten Filterdeckel entlang der Linie I - I mit einer Erläuterung des Wasserablaufkonzepts gemäß der vorliegenden Offenbarung,
• die 4 zeigt eine Seitenansicht eines Filterdeckels gemäß dem Ausführungsbeispiel der Erfindung,
• die 5 zeigt eine Draufsicht des in der 4 dargestellten Filterdeckels,
• die 6 zeigt eine Detailansicht des in den 4 und 5 dargestellten Filterdeckels am Ende des Auslassstutzens,
• die 7 zeigt einen Ausschnitt der Kraftfahrzeugklimaanlage während dem Befestigen bzw. Lösen des Filterdeckels gemäß dem Ausführungsbeispiel der Erfindung,
• die 8 zeigt eine Seitenansicht der unteren Gehäusehälfte mit Filterdeckel,
• die 9 zeigt eine Schnittansicht der in der 8 dargestellten unteren Gehäusehälfte entlang der Linie II - II,
• die 10 zeigt den Detailausschnitt A2 aus der 9 und
• die 11 - 12 zeigen den Detailausschnitt A1 aus der 3. In zwei Ausfü hru ngsvarianten.

The invention will now be explained in more detail using an exemplary embodiment and with reference to the figures.

• The 1 shows a perspective view of a lower housing half of an air-guiding duct system for a motor vehicle air conditioning system with a releasably connected filter cover according to the exemplary embodiment of the invention,
• the 2 FIG. 13 shows a top view of FIG 1 shown lower housing half with filter cover including an explanation of the water drainage concept according to the present disclosure,
• the 3 FIG. 13 shows a sectional view through the in FIG 2 illustrated filter cover along the line I - I with an explanation of the water drainage concept according to the present disclosure,
• the 4th shows a side view of a filter cover according to the embodiment of the invention,
• the 5 FIG. 13 shows a top view of the FIG 4th illustrated filter cover,
• the 6th shows a detailed view of the in the 4th and 5 illustrated filter cover at the end of the outlet nozzle,
• the 7th shows a section of the motor vehicle air conditioning system during the fastening or loosening of the filter cover according to the exemplary embodiment of the invention,
• the 8th shows a side view of the lower housing half with filter cover,
• the 9 FIG. 13 shows a sectional view of the FIG 8th the lower half of the housing shown along the line II - II,
• the 10 shows the detail section A2 from 9 and
• the 11 - 12th show detail A1 from 3 . In two versions.

In the 1 is a perspective view of a lower housing half of an air duct system for an automotive air conditioning system 1 shown, which with a releasably connected filter cover 30th is equipped according to the embodiment of the invention. The 2 shows a corresponding plan view of the same vehicle air conditioning system 1 . The lower half of the housing has several housing areas 10-15 which is made in one piece as an integral plastic injection molded part. The air-conducting duct system is closed airtight by placing an upper housing half with the lower housing half along the common connecting line (not shown). These two housing halves represent the main body of the air-conducting duct system, it being possible for further housing parts, for example motor mounts or expansion ducts to the air outlets or a rear air-conditioning unit (not shown), to be connectable therewith.

The lower half of the housing includes, among other things, a spiral housing area 10 , in which a fan, in particular a radial fan, can be used (not shown). The operation of the fan causes the air in the air duct system to flow over the housing area 11 accelerated to be directed towards the air outlets to the passenger compartment. For this purpose, the air first passes a filter, not shown here, which is in the housing area 12th , the filter assembly space, can be used and also removed again. For this purpose is below the filter mounting space 12th a filter opening 18th provided through which the air filter can be inserted from below or an inserted air filter can be removed again downwards. The filter opening 18th is preferred when the vehicle air conditioning system is installed 1 Arranged in such a way that it is accessible above the footwell of the passenger seat, so that a filter change can be carried out comfortably via the passenger cabin and not via the engine compartment. The filter opening 18th is with a filter cover 30th lockable, as will be described in detail below. The air filtered through the air filter is then passed through a housing area 13th routed to the air outlets in the passenger compartment, where it can be blown into the passenger compartment depending on the control of the air outlet flaps (not shown).

When operating the motor vehicle air conditioning system 1 it regularly happens that water, in particular splash water, enters the air-carrying duct system from outside the motor vehicle. For this purpose, there is a splash water drainage channel in the air duct system 16 provided, by means of which the water that has penetrated in this way spreads along the housing areas located downstream of the fan 10 , 11 settled downwards by gravity, over the filter cover 30th collected and removed from the case 10-15 is derived. By diverting the spray water through the spray water drainage channel 16 this prevents splash water into the area downstream behind the air filter, i.e. the housing area 13th , can penetrate.

It is also in the automobile air conditioner 1 according to the embodiment of the invention, a condensation drainage channel 17th provided, which is guided between an evaporator, not shown, to be arranged in the housing area 14 and the adjacent housing inner wall of this housing area 14. There is a passage in this area in the inner wall of the housing 19th formed to the outer wall of the housing, which is laterally below the filter opening 18th leads out of the housing. On the filter cover 30th is an outlet port 32 provided, which in the passage 19th is insertable so that the splash water drainage channel 16 via the outlet nozzle 32 into the condensation drainage channel 17th flows out.

In the 3 FIG. 13 is a sectional view through the one in FIG 2 illustrated filter cover 30th shown in more detail along the line I - I. The water drainage concept and the merging of the two water drainage channels 16 , 17th according to the present disclosure is hereby further clarified. More details about the outlet nozzle 32 in the image section A1, with reference to the 11 explained in more detail below.

In the 4th - 6th is the filter cover 30th described in more detail according to the embodiment of the invention. The 4th and 5 show the filter cover 30th in side view or in plan view, while in the 6th a detailed view of the filter cover 30th at the end of the outlet port 32 is shown.

The filter cover 30th is trough-shaped for collecting water and made of the same plastic as the housing 10-15 of the air duct system. At the bottom of the filter cover 30th is a gutter 35 formed, which extends to the outlet port 32 extends. The slope of the gutter 35 in the exemplary embodiment is approximately 5% in the outlet direction. In modified embodiments, other flat angles of inclination, in particular between 2 ° and 10 °, can be expedient, depending on the installation width for the filter cover 30th is provided and for which capacity the filter cover 30th or what maximum flow rate the water drainage system is designed for.

At the top of the filter cover 30th runs a groove 31 that is designed to have a circumferential around the filter opening 18th running bead 20th enter into a tongue-and-groove connection as shown with reference to the 10 will be explained. At the outlet port 32 opposite end is on the filter cover 30th a rest 40 intended.

The outlet port 32 has an angular U-shape, ie a rectangular cross-section that is open at the top in the installed position. The circumference of the top of the filter cover, which is otherwise in one plane 30th includes the end of the outlet port 32 a bevel 33 . At the end of the outlet port 32 is a stop 34 provided, which is U-shaped along the entire cross section of the outlet nozzle 32 runs. The inner cross-section of the outlet nozzle 32 , i.e. the one for the splash water drainage channel 16 effective cross-section, protrudes relative to the outer cross-section of the outlet nozzle 32 a few millimeters to about an inch out. Directly at the outlet end of the inner cross-section, on the underside, there is a drip nose protruding vertically downwards 36 provided, their function with reference to the 11 will be explained in more detail.

In the filter cover 30th is a rib structure made up of a central rib 37 , several longitudinal ribs running parallel to it 38 and other inclined ribs 39 educated. The oblique ribs 39 moderate the water flow of the splash water drainage channel 16 by directing the water at an angle to the gutter on the one hand and breaking a possibly violent surge of splash water on the other hand and gradually converting it into a laminar flow towards the outlet direction. The further function of the rib structure is discussed in connection with the 10 discussed in more detail.

In the 7th is a section of the vehicle air conditioning system 1 while attaching or loosening the filter cover 30th shown according to the embodiment of the invention. For inserting the filter cover 30th becomes the outlet port 32 obliquely from below into the passage 19th introduced. To prevent slipping off the filter cover 30th when attaching the outlet nozzle 32 into the passage 19th by means of the stop 34 pre-positioned so that by swiveling it up in the assembly direction M. the filter opening around the attachment point 18th is lockable. The U-shaped circumferential stop 34 closes the passage 19th Completely. It is then attached to the far end using the catch 40 which is integral with the housing section 10 , 11 provided counter-locking means (not shown) engages.

In the 8th Figure 13 is a side view of the lower half of the housing of the automotive air conditioning system 1 shown. The section shown there along the line II - II is in the 9 shown. In this illustration is the filter assembly room 12th with the filter cover underneath 30th better to see. The detail section A2 drawn there is in the 10 reproduced in more detail.

The area around the filter opening 18th is as mentioned above with a bead 20th equipped, which in the groove 31 on the upper edge of the filter cover 30th engages and forms a tongue and groove connection with this in the assembled state. By keeping the water in the gutter 35 is collected and via the drainage nozzle 32 is derived, the tongue and groove connection does not have to be watertight. Therefore, additional sealing material can be dispensed with in this area.

On the housing in the area of the filter opening 18th is also circumferentially a drip edge 21 provided which is within the cross section of the filter opening 18th and spaced from the tongue and groove connection 20th , 31 is arranged. Splash water, which over the splash water drainage channel 16 is directed, can thus freely into the gutter 35 of the filter cover 30th Drain without leaving water on the inside of the groove 31 could settle.

When installed, the air filter is in the air filter room 12th on the one in the filter cover 30th trained longitudinal ribs 38 and is supported by them from below. The air filter is activated when the filter cover is closed 30th to the midrib 37 pressed. The central rib is advantageous 37 slightly higher than the longitudinal ribs 38 educated. For example, it is 1mm - 3mm higher. This places the midrib in the contact area 37 with the air filter creates a great airtightness, so that no air is below the air filter from the housing area 11 in the housing area 13th can escape. The air filtering is thus carried out by the filter cover according to the invention 30th not affected.

In the 11 is a detail from A1 3 . shown in more detail. Introducing the outlet nozzle 32 into the passage 19th is made by the bevel 33 facilitated. This allows the drip nose 36 slightly at the lower edge of the passage 19th pass until the circumferential stop 34 at the lower point of the outer edge of the culvert 19th strikes. The filter cover 30th can then be swiveled upwards and locked in place comfortably without slipping as described above.

The bevel 33 can be adapted depending on the embodiment. The angle of the bevel 33 opposite the remaining top edge of the filter cover 30th or the outlet nozzle 32 can be a few degrees. The bevel 33 must in particular so to the geometry of the passage 19th and the outlet port 32 can be adjusted so that it can be inserted at an angle from below. It should be noted that when inserting the outlet nozzle 32 into the passage 19th neither the bevel 33 at the top of the culvert 19th nor the drip nose 36 at the lower edge of the passage 19th Keeps hanging.

In the exemplary embodiment shown, if the wall thickness of the housing is sufficient in the area of the passage 19th of typically 1 - 2mm and the length of the drip nose 36 of a similar order of magnitude, a bevel of approx. 10% over half the length of the outlet connection 32 . However, the bevel can also have significantly larger angles, for example 30 ° or 45 °, which enables a steeper attachment to the assembly. It must be ensured that a maximum specified gush of spray water still passes through the sloping and lower wall of the outlet nozzle 32 can be derived. A concern of the outlet port 32 on the housing section 15th increases the tight fit of the filter cover 30th in assembled condition.

In the 12th is one to the in the 11 shown alternative embodiment. The difference to the variant in the 11 is that on the outside of the housing area 14 below the passage 19th a hinge bushing 34a is provided. On the underside of the filter cover 30th is also a hinge leg 34c attached, which at its end has a hinge axis 34b having. The hinge axis 34b can in the hinge socket 34a be attached and thus facilitates the assembly of the filter cover 30th . In order to avoid the insertion of the outlet nozzle during this application 32 into the passage 19th to facilitate is instead of the drip nose 36 a drip edge 36 ' intended.

After swiveling up the filter cover 30th the free end of the outlet nozzle protrudes 32 into the condensation drainage channel 17th into it, with the drip nose 36 or the drip edge 36 ' is arranged at a distance from the inner wall of the housing section 14. In this way it is avoided that water settles on the inner cross-section of the passage 19th so that additional sealants can be dispensed with in this area as well.

List of reference symbols

1

Automotive air conditioning

10-15

Housing areas

16

Splash water drainage channel

17th

Condensation drainage channel

18th

Filter opening

19th

passage

20th

Bead, spring

21

Drip edge

30th

Filter cover

31

Groove

32

Outlet port

33

bevel

34

attack

34a

Hinge bushing

34b

Hinge axis

34c

Hinge legs

35

Gutter

36

Dripping nose

36 '

Drip edge

37

Midrib

38, 39

Ribs

40

Rested

M.

Mounting direction

Claims (10)

Motor vehicle air conditioning system (1), comprising - a housing (10-14) with an air-conducting duct system, - a fan which is arranged in the air-conducting duct system, - a filter assembly space (12) which is suitable for receiving an air filter in the air-conducting duct system, - a Filter opening (18) provided below the filter assembly space (12) through which an air filter can be inserted or an inserted air filter can be removed, - a filter cover (30) releasably connected to the housing (10-14), by means of which the filter opening (18) can be closed , the filter cover (30) being trough-shaped for collecting water, - a first water drainage channel (16) which is connected to the air-conducting channel system and via which water in the air-conducting channel system via the filter cover (30) out of the housing (10 - 14) can be derived, - wherein the housing (10-14) comprises a second water drainage channel (17), and - the second water drainage channel (17) through at least one section of a housing inner wall (14) is formed with a passage (19) to the housing outer wall , characterized in that - an outlet nozzle (32) is provided on the filter cover (30) which can be attached to the passage (19) at an angle from below, wherein the passage (19) supports the outlet connector (32) from below and the outlet connector (32) opens into the second water drainage channel (17), and - the passage (19) and the filter opening (18) by pivoting up the filter cover (30) from are tightly closable on the outside. Motor vehicle air conditioning according to Claim 1 , characterized in that the outlet nozzle (32) has a rectangular or U-shaped cross section. Motor vehicle air conditioning according to one of the Claims 1 or 2 , characterized in that the outlet nozzle (32) is open at the top in the installed position. Motor vehicle air conditioning system according to one of the preceding claims, characterized in that the underside of the outlet connection (32) and / or the filter cover (30) in the installed position is formed by a channel (35) which is inclined downwards at a slight angle in the outlet direction. Motor vehicle air conditioning system according to one of the preceding claims, characterized in that stop means (34; 34a-34c) are provided on the outlet connector (32) which preposition the filter cover (30) when the outlet connector (32) is placed in the passage (19) so that through Swiveling up around the stop point, the filter opening (18) can be closed. Motor vehicle air conditioning system according to one of the preceding claims, characterized in that - the free end of the outlet connection (32) protrudes into the second water drainage channel (17) when the filter cover (30) is installed and - at the free end of the outlet connection (32) at least in the second water drainage channel (17) protruding dripping means (36, 36 ') are formed. Motor vehicle air conditioning system according to one of the preceding claims, characterized in that - the housing (10-14) is made of plastic and - the filter cover (30) with the area around the filter opening (18) and / or with the area around the passage (19 ) is designed as a tongue and groove connection (20, 31) from the plastic of the housing (10-14). Motor vehicle air conditioning according to Claim 7 , characterized in that drip noses (21) are provided on the housing in the area of the filter opening (18), which are arranged within the cross-section of the filter opening (18) and at a distance from the tongue and groove connection (20, 31). Motor vehicle air conditioning system according to one of the preceding claims, characterized in that a longitudinally extending rib structure (37, 38) is formed in the filter cover (30) and is in physical contact with the air filter when the filter cover (30) is installed. Motor vehicle with an air conditioning device (1) according to one of the preceding claims, wherein the filter opening (18) which can be closed by the filter cover (30) is arranged above the footwell of the passenger seat.

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