DE10249087B4 - Transmission or hydraulic system ventilation and / or ventilation device - Google Patents

Abstract

Gearbox or hydraulic system ventilation and / or ventilation device (1), which has a base body (5) with a passage (58), a closure device (2, 3, 5, 6) being provided for closing the passage (58), and the closure device (2, 3, 5, 6) comprises a closure element (2) which is arranged on the base body (5) such that it can be moved via guide members (25, 28, 54, 55) such that the closure element (2) has at least two Can take positions on the base body (5), wherein in a first position the passage (58) is blocked at least from the inside to the outside with respect to a system to be vented and / or ventilated and in a second position a passage through the passage (58) is at least possible when predetermined system values are reached, which require ventilation and / or ventilation, characterized in that the closure element (2) has spacers (26a, 26b) which extend from the closure element (2) to the valve (3 ) and / o of the filter unit (8) act in such a way that when the closure element (2) is positioned in the first ...

Description

The invention relates to a transmission or Hydraulikungsanlagenentlüftungs- and / or -ventilation device having a base body with a passage, wherein on the base body a closure device is provided for closing the passage.

State of the art

Devices for ventilation are known from the prior art z. B. by the writings DE 196 13 480 A1 and DE 40 30 524 A1 known. Also devices of the aforementioned type are already known, for. B. by the JP 59-013171 A and the WO 99/61826 A1 , In particular, by closing the passage an undesirable leakage of oil is avoided. This is important, for example, if the relevant transmission or hydraulic system is not properly positioned during storage or transport.

In not tightly closed venting or ventilation devices, it may therefore come to an uncontrolled leakage of oil into the environment, which may be associated with a significant hazard potential. Especially with gear or hydraulic fluids based on hydrocarbon, even relatively small amounts leaked can lead to some significant problems, as a number of hydrocarbons are highly polluting or water endangering. Furthermore, they have a friction-reducing effect and can, for example, trigger a considerable risk of slipping.

These negative effects require appropriate countermeasures.

A common embodiment comprises a closure flap, which consists for example of a rubber membrane, which seals the passage through the main body of the device.

Should z. B. after storage or transport the venting or ventilation device are put into operation, the closure tab can be deducted from the valve.

Another option is z. B. from the US 5,562,188 A It is known, for example, to provide sealing screw-in nipples in the gearbox or hydraulic housing for transport or storage at the point where otherwise the device for venting or venting is placed.

These solutions mentioned but can only partially satisfy. A peelable locking tab must be introduced with a considerable effort in the valve or filter and is no longer applicable after their destructive removal.

The solution with a screw-in Absperrnippel, involves a relatively high cost when replacing the valve or filter unit. In addition, it should be noted that such screw-in nipples are hardly stored for long periods of time and therefore are not available in the event that they are needed again.

Purpose and advantages of the invention

The invention is based on the object to provide a device of the type described above, which allows a simple storage and transport protection without the disadvantages mentioned above in a compact design.

This object is achieved in conjunction with the features of the preamble of claim 1 according to the invention by the characterizing features of claim 1.

The features mentioned in the dependent claims advantageous embodiments and developments of the invention are shown.

The transmission or hydraulic system ventilation and / or ventilation device according to the invention with a base body with passage has a closure device for closing the passage, wherein the closure device has a closure element which is movably arranged on the main body via guide members and can occupy at least two positions on the base body. In the first position, it is ensured that at least from the interior of a system to be vented and / or ventilated, no liquid or gas can escape to the outside, since the passage is blocked. In the second position, a passage through the passage at least temporarily possible, for. B. in particular, if pressure conditions inside a venting and / or ventilating system make a pressure equalization necessary.

The functionality of the closure device is realized by spacers on the closure element, which act on corresponding contours of other elements. A valve unit is designed so that spacers of the closure element block movement of the plunger element of a valve unit only in the "blocking position", but otherwise allow the free functionality of the valve. In another case, in a device with a filter unit, the spacers may define a plunger in the "blocking position" in a " Blockade "bring, but in other possible positions of the closure element, the movement of the plunger, z. B. by a spring element, in a "passage position" allow.

A significant advantage of the invention is the fact that the closure device is repeatedly and easily locked or unlocked. This provides an adjustable "blocking position" and "passage position" at any time over the entire service life of the device.

An adjustable locking position at any time is in contrast to the solutions according to DE 196 13 480 A1 . DE 40 30 524 A1 and JP 59-013171 A not offered. Opposite the solution in the WO 99/61826 A1 is described, the device of the invention has the advantage that only z. B. two positions and no other intervening intermediate positions are adjustable. As a result, the device according to the invention offers a comparatively higher safety in use.

In addition, the closure device according to the invention works non-destructive and makes in particular with multiple use no additional operation for inserting shut-off elements, such. B. closure tabs necessary.

Spacers can also be formed easily and space-saving on the corresponding components. They allow exact distances of adjacent elements associated with each other and can also save space to take on other function, such. B. engaging elements for securing predetermined trajectories or engagement positions.

Not least, the proposed device can be realized with a compact design, since the closure element is arranged on the base body.

A likewise advantageous embodiment of the invention provides that in the movement of the closure element from the first to the second position and vice versa, the closure element remains in constant engagement with the base body. This ensures a defined adjustment of the closure element and thus a reliable achievement of the desired position.

In a further preferred embodiment of the invention, the guide members on the closure element and the base body are formed such that the closure element with respect to the main body of the first to move to the second position and vice versa by the cooperation of the guide members on a clearly predetermined path. This procedure avoids uncontrolled positions of the closure element on the base body and thus increases the reliability of the device. Even if the closure device is not moved, the closure device is in a predetermined position and can not be adversely affected by uncontrolled movements on the device itself or on adjacent thereto areas.

In an advantageous embodiment of the device according to the invention, a valve unit is formed in the passage of the main body. All suitable types of valves known from the prior art can be used in principle for this purpose. In particular, conventional automatic vent or vent valves are conceivable. Also formed on the body combined ventilation valves are conceivable. According to the invention, the valve unit is blocked in a first position of the closure element, whereas it can work in the intended manner, at least in the second position. Ie. in the second position, upon reaching predetermined pressure values in a system to be vented and / or ventilated by opening the valve unit, the passage in the main body can be released with a corresponding pressure equalization. Preferably, in the valve unit z. B. elastically biased plunger element used.

For a further preferred embodiment of the device according to the invention is also proposed that in a positioning of the closure element in a first position and in its movement from the first position to the second position and vice versa, in particular on a clearly predetermined path, the passage at least from the inside to the outside is locked in relation to a system to be vented and / or ventilated and only in the second position is passage through the passage at least possible when predetermined system values are reached, which necessitate aeration and / or venting. By this embodiment, an unwanted leakage of liquid or gas from transmissions or hydraulic systems can be particularly reliably avoided, since such is possible only in one position. This solution also ensures, in particular, that a closure element which is in the locked position and which is inadvertently closed, e.g. B. during transport, is slightly moved, does not necessarily lead to leakage of oil or the like.

Advantageously, the closure element snaps or snaps into the "passage position". This measure not only ensures that the device, once activated, remains in the "working position", but also a Transition from the "blocking position" into the "passage position" noticeable and thus for an operator aware of it. In addition, the closure element can engage in the "passage position" with the advantages mentioned.

It is particularly preferred if the closure element is rotatable. This allows on the one hand a simple operation of the closure element and on the other hand, an accidental operation by turning relatively unlikely, especially if a rotation by a correspondingly large angle between "blocking position" and "passage position" is necessary. The rotatable arrangement of the closure element also allows a compact design of the device, especially when largely rotationally symmetric components are used.

A likewise particularly preferred embodiment provides a filter unit formed on the main body in the passage. The filter unit can be positioned to save space in the body. For filtering tasks, a conventional filter unit may be provided which filters the incoming and outgoing liquid and gas streams.

In connection with filter units, the device according to the invention can be designed so that it is locked in the "blocking position" and possibly also on the way to a "passage position" both from inside to outside and from outside to inside with respect to a system, but in the "Durchlassstellung" constantly a connection from the inside out and vice versa exists. However, an embodiment is also conceivable in which a filter unit is combined with a valve so that the functionalities described above can be carried out. Accordingly z. B. in the "passage position" only a patency on reaching certain system parameters and in the "blocking position" Although a secure blocking the passage in relation to a system from the inside out, but still a continuity from outside to inside is possible.

For attachment to a transmission or to a hydraulic system, a fastening section is advantageously provided on the device, for example on the base body, by means of which the base body can be releasably attached. The device has z. As an external thread, whereby they can be screwed into a matching female threaded portion.

Finally, a further embodiment of the object of the invention provides that it has a known separation device which minimizes the amount of gas or liquid that can pass through the passage. A separation device is particularly suitable for particularly sensitive fluids such as oil and the like, which must be expected to have some far-reaching consequences when exiting. Such known separation devices can be, for example, spray tubes, baffles or drip traps.

For the components of the transmission or hydraulic system ventilation and / or -ventilation device according to the invention a number of materials are conceivable. In addition to various steel materials especially plastics are suitable.

figure description

The following drawings show two specific embodiments of the invention, which are described in more detail by specifying further details and advantages and illustrate the invention thereby. Show it:

1a a partially sectioned first embodiment of a device according to the invention with an automatic vent valve in a position in which venting is possible,

1b the embodiment shown partially in section according to 1a in a position in which the passage is blocked,

2a a bottom view of a valve unit of the embodiment according to 1a . 1b .

2 B a side view of the valve unit according to 2a .

2c a sectional view of the valve unit according to 2 B .

2d a top view of the valve unit according to 2a .

3a a top view of a closure element of the embodiment according to 1a . 1b .

3b a bottom view of the closure element according to 3a .

3c a sectional view of the closure element along the line AB according to 3b .

3d an enlarged partial view of the sectional view according to 3c .

3e a partial view of a sectional view along the line EE according to 3b .

3f the sectional view of the closure element along the line CD according to 3c .

4a a sectional view of a main body and a valve body with O-ring in the assembled state for an embodiment according to 1a and 1b .

4b a top view of the main body and the valve body of 4a .

5a a partially sectioned second embodiment of a device according to the invention with a ventilation filter in a position in which a ventilation and venting is possible, and

5b the embodiment shown partially in section 5a in a position in which the passage is locked from inside to outside.

Description of the embodiments

The 1a and 1b show a fully assembled automatic vent valve 1 for example, a partially filled with oil transmission housing (not shown) with a closure element 2 , which is hereinafter referred to as a rotating cap.

The turning cap 2 partially surrounds a base body from above 5 , which is referred to below as a hollow screw. The banjo bolt has a passage 58 in which a valve body 3 as a valve unit with a spiral spring 4 is arranged. The individual components are positioned concentrically to each other and usually with a longitudinal axis A of the vent valve 1 installed vertically aligned in a gearbox housing.

The passage 58 the hollow screw 5 expands from bottom to top through ring surfaces 52 . 53a and 53b , In the lower part of the banjo bolt 5 , with an external thread 50 is provided has the hollow screw 5 a lower opening 51 on. The banjo bolt 5 can over the external thread 50 in a transmission housing (not shown) are screwed and seals via an elastic O-ring 7 against this.

In the banjo bolt 5 is the valve body 3 introduced from above. He is externally formed so that he with a small ring gap-like distance to the inside of the hollow screw 5 is spaced. The valve body 3 ( 2a to 2d ) has a lower portion with a round pin 30 and in the upper part a guide part 31 on. The upper edge of the guide part 31 shows a ring bridge 32 with four outwardly projecting tongues 33 . 34a . 34b . 34c ,

At the upper outer circumference of the round pin 30 is on a ring surface 30a (S. 2 B ) an O-ring 6 stuck tight. The O-ring 6 adjoins up to an annular surface 31a of the leadership part 31 at. The O-ring 6 seals in the case of the blocking valve 1 ( 1a . 1b ) between the ring surface 31a and the parallel annular surface 52 the hollow screw 5 the passage 58 from the opening 51 to the room outside the valve 1 from. Outside at the round pin 30 are four evenly recessed vertically to the annular surface 30a running half-round grooves 35 formed, which serve as "passageways".

In the condition of the vent, gases can go up to a lid 20 the turning cap 2 ascend and then diverted through an inside 20a of the lid 20 down over here exemplarily eight flow channels 21 ( 3b . 3d . 3f ) on the inside of a ring mantle 22 to flow outside into the environment.

A lock on the passage 58 through the vent valve 1 done by the sealing concern of the O-ring 6 on the ring surfaces 31a and 52 , Between the O-ring 6 and the inside of the hollow screw 5 remains radially outwardly a narrow annular passage gap s (s. 1a ) free.

So that the O-ring 6 to block the passage 58 through the vent valve 1 with a predetermined force against the ring surface 52 is pressed, is in a center in the guide part 31 upwardly open bore 36 the spiral spring 4 inserted. It also brings a restoring force after releasing the passage 58 through the vent valve 1 on the valve body 3 on. As bearing surfaces for the spiral spring 4 , serves a bore base 36a the bore 36 and the inside of the lid 20a of the lid 20 ,

The turning cap 2 shows how special from the 3b . 3c . 3d and 3f appears on the inside of her ring mantle 22 here by way of example eight vertically directed webs 23 on. These run here parallel and evenly spaced over the inner circumference to each other. The beveled flanks 23a ( 3d . 3f ) formed webs 23 have over the web width vertically approximately in the middle increased latching noses 25 on, in the assembled state in a correspondingly shaped circumferential annular groove 54 (esp. 4a ) of the banjo bolt 5 to run.

The snapping noses 25 and the ring groove 54 fit snugly into each other, allowing a vertical fixation of the rotating cap 2 to the hollow screw 5 or at the same time a guide at a rotation of the rotary cap 2 is possible.

In the assembled state of the bleeder valve 1 can take place in the case of a pressure increase inside the gearbox according to the known principle of conventional vent valves, a ventilation of the gearbox interior. In this case, when a threshold value is exceeded, pressure forces lead to the active surfaces directed towards the inside of the gearhead 35a . 35b of the journal 30 act against the spring force to a displacement of the valve body 3 upwards and thus give the passage 58 for escaping liquid and / or escaping gas until the pressure inside the transmission decreases.

The bleed valve shown 1 has a mechanism according to the invention, with which can be optionally set whether the vent valve 1 as usual works on the known principle, or whether the passage 58 should be permanently blocked.

This is achieved by any number of times in a position from the outside z. B. by hand, the lid 2 can be twisted to the passage 58 to block (s. 1b ) or in a different position for certain system values, eg. B. a threshold value of the internal pressure to allow a continuity (s. 1a ). With locked passage 58 becomes the vertical movement of the valve body 3 upwards from the state of the closed vent valve 1 prevented.

For twisting the rotary cap 2 , is the outside of the ring mantle 22 with vertical turning aids 22a fitted.

By twisting the rotary cap 2 come two diametrically on the inside of the lid 20a opposite arranged round conical distance teeth 26a . 26b in a latching position, each with a pair of diametrically opposite recesses 37a . 37b respectively. 38a . 38b in an upper end face arranged annular surface 39 of the valve body 3 ,

The two distance teeth 26a . 26b move during rotation along partial sections of a circular path K (s. 4b ) with the radius r about the longitudinal axis A. Starting from the first position (s. 1b ), are the distance teeth 26a . 26b after rotation by 90 ° in the second position (s. 1a ). The distance teeth come 26a . 26b depending on the selected position in adjacent position to the pairs of similar recesses 37a . 37b ( 1a ) respectively. 38a . 38b ( 1b ).

The example round funnel-shaped recesses 37a . 37b are in contrast to the recesses 38a . 38b deeper, ie to the funnel tip, in the ring surface 39 spared. Due to their size and shape, a vertical movement of the valve body 3 from the position of the blocked passage 58 through the vent valve 1 not blocked upwards.

In the position according to 1a is the vent valve according to the invention 1 automatically functioning in a known manner.

In contrast, in the position according to 1b prevents the valve body from rising when the pressure in the gearbox is increased accordingly 3 is moved upward and thereby a passage 58 through the vent valve 1 releases. This is due to the presence of the distance teeth 26a . 26b in the recesses latched in there 38a . 38b at the valve body 3 enforced.

The valve body 3 So it can move up to the maximum until the distance teeth 26a . 26b in the respective recesses 37a . 37b such as 38a . 38b queue.

In the blockade position, there are also two adjacent ones on the ring land 32 radially outwardly projecting tongues 33 . 34a . 34b . 34c up against two on the inside of the lid 20a trained distance bridges 27a . 27b (S. 3b ) at. The limitation of the vertical movement of the valve body 3 upwards thus reliably prevents unwanted oil passage to the outside.

So that a defined rotation of the rotary cap 2 opposite the banjo bolt 5 or the valve body 3 90 ° is possible, is a quarter-ring-shaped guide bar 28 (S. 3c ) on the inside of the lid 20a , in the area of the transition to the ring mantle 22 (S. 3d ) educated. The guide bar 28 has a vertically concentric to the longitudinal axis A extending, curved inner surface 28a , which is slightly further from the longitudinal axis A, than the spaced apart from the longitudinal axis A outer peripheral surfaces of the tongues 33 . 34a . 34b . 34c , so that the curved inner surface 28a on the outer peripheral surfaces of the corresponding tongues 33 . 34a . 34b . 34c can turn around. A horizontal down facing support surface 28b of the guide bar 28 runs when turning the rotary cap 2 on an opposite, front-side annular surface 55a of the upper edge area 55 the hollow screw 5 , The border area 55 , which amounts to more than half of the entire upper ring surface of the banjo bolt 5 is located slightly offset with respect to the subsequent upper edge region 56 that has an upper ring surface 56a includes. The bearing surface 28b of the guide bar 28 can only reach a maximum of 90 ° on the upper ring surface 55a Twist until each one of two narrow sides 28c . 28d of the guide bar 28 at one of two paragraphs 57a . 57b pending. The paragraphs 57a . 57b arise at the dividing line between the raised edge area 56 and the lower edge area 55 at the upper edge of the banjo bolt 5 ,

The twisting of the rotary cap 2 is thus essentially due to the interaction of the guide bar 28 with the upper ring surface 55a and the paragraphs 57a . 57b certainly.

Out 4b it can be seen that the tongue 33 a slightly larger dimension in the circumferential direction than the other three tongues 34a . 34b . 34c having. This ensures that the banjo bolt 5 and the valve body 3 just fit into each other when the recess 33 centrally in the upper edge area 56 . 56a is positioned.

As in 3a shown as an example, can usually be used for z. B. operators visible outside of the lid 20 general information or instructions on the direction of rotation can be applied for a corresponding setting.

Both in the position according to 1a and 1b , as well as twisting the rotary cap 2 , a tension remains between the valve body 3 and rotating cap 2 receive. In the first position (s. 1b ) this is due to the concern of the spacer teeth 26a . 26b in the recesses 38a . 38b scored, with the distance teeth 26a . 26b the valve body 3 with the O-ring 6 down against the ring surface 52 To Print. In the second position (s. 1a ) results in the voltage from between the valve body 3 and the turning cap 2 inserted spiral spring 4 , Finally, even when turning the rotary cap 2 by the concern of the distance teeth 26a . 26b on the ring surface 38 of the valve body 3 receive a voltage, causing the valve body 3 with the O-ring 6 safe against the ring surface 52 is pressed.

In 5a and 5b a further embodiment of a device according to the invention is shown, which differs from that in the 1a to 4b shown vent valve 1 a filter unit 9 shows, where in the hollow screw 5 a closing body 8th in place of the valve body 3 is provided. The closing body 8th is essentially identical to the valve body described above 3 ,

The turning cap 2 and the banjo bolt 5 are identical to the components shown in the 1a to 4b ,

A difference to the components shown above, however, is in the area in which the round pin 30 is formed. This area has a concentric bore 80 on that up in a leadership section 81 enough. A spiral spring 82 lies at the bore base 80a on a top 83a a round filter insert 83 on. The filter insert 83 is through the coil spring 82 against a circular heel 59 at the bottom of the banjo bolt 5 pressed and is circumferentially touching on the inside of the hollow screw 5 at.

The filter element 83 can be constructed like a conventional filter that works in a known way.

In 5a is shown a state in which the turning cap 2 relative to the hollow screw 5 and the closing body 8th is positioned so that the distance teeth 26a . 26b vertically adjacent to the recesses 37a . 37b are. The closing body 8th thus allows a permanent passage from outside to inside or vice versa, by the coil spring 82 the filter body 8th against the distance teeth 26a . 26b the turning cap 2 prints. This raises the O-ring 6 from the ring surface 52 from which, via an annular gap system, a passage through the filter body 8th is released.

As in 5b indicated, after turning the rotary cap 2 the passage 58 through the filter 9 blocked. In this position is the O-ring 6 sealing on the ring surface 52 the hollow screw 5 at. The distance teeth 26a . 26b prevent vertical movement of the closing body 8th ,

The mechanism of the safety lock for the filter 9 results analogous to the already for the vent valve 1 described mechanism.

LIST OF REFERENCE NUMBERS

1

vent valve

2

rotating cap

3

valve body

4

spiral spring

5

Hohlschraube

6

O-ring

7

O-ring

8th

closing body

9

filter

20

cover

20a

Inside cover

21

flow channel

22

ring jacket

22a

turning aids

23

web

23a

Steg edge

24

Ring jacket edge

25

catching lugs

26a

Gap tooth

26b

Gap tooth

27a

spacer web

27b

spacer web

28

guide web

28a

palm

28b

land surface

28c

narrow side

30

round peg

30a

ring surface

31

guide part

31a

ring surface

32

ring land

33

tongue

34a

tongue

34b

tongue

34c

tongue

35

semicircular groove

35a

effective area

35b

effective area

36

drilling

36a

Hole bottom surface

37a

recess

37b

recess

38a

recess

38b

recess

39

ring surface

50

external thread

51

opening

52

ring surface

53a

ring surface

53b

ring surface

54

ring groove

55

border area

55a

ring surface

56

border area

56a

ring surface

57a

paragraph

57b

paragraph

58

passage

59

paragraph

80

drilling

80a

Hole bottom surface

81

guide part

82

spiral spring

83

filter cartridge

83a

top

Claims (10)

Transmission or hydraulic system ventilation and / or ventilation device ( 1 ), which is a basic body ( 5 ) with a passage ( 58 ), wherein a closure device ( 2 . 3 . 5 . 6 ) for closing the passage ( 58 ) is provided, and wherein the closure device ( 2 . 3 . 5 . 6 ) a closure element ( 2 ), which on the base body ( 5 ) about governing bodies ( 25 . 28 . 54 . 55 ) is arranged movable, that the closure element ( 2 ) at least two positions on the main body ( 5 ), wherein in a first position the passage ( 58 ) is locked at least from the inside to the outside with respect to a system to be vented and / or ventilated and in a second position, a passage through the passage ( 58 ) is possible, at least when predetermined system values which require aeration and / or venting are reached, characterized in that the closure element ( 2 ) Spacers ( 26a . 26b ), which from the closure element ( 2 ) on the valve (3) and / or filter unit ( 8th ) act in such a way that during the positioning of the closure element ( 2 ) in the first position, the passage ( 58 ) is locked at least from the inside to the outside with respect to a system to be vented and / or ventilated and in the second position, a passage through the passage ( 58 ) is possible, at least when predetermined system values have been reached, which necessitate aeration and / or venting. Device according to claim 1, characterized in that the guiding organs ( 25 . 28 . 54 . 55 ) are formed such that during a movement of the closure element ( 2 ) from the first position to the second position and vice versa, the closure element ( 2 ) in constant engagement with the main body ( 5 ) remains. Device according to claim 1 or claim 2, characterized in that the guiding organs ( 25 . 28 . 54 . 55 ) on the closure element ( 2 ) and at the base body ( 5 ) are formed such that the closure element ( 2 ) with respect to the main body ( 5 ) from the first to the second position and vice versa, through the cooperation of the governing bodies ( 25 . 28 . 54 . 55 ) moved on a clearly predetermined path. Device according to one of the preceding claims, characterized in that on the base body ( 5 ) in the passage ( 58 ) a valve unit ( 3 ) is trained. Device according to one of the preceding claims, characterized in that the valve unit ( 3 ) a plunger element ( 30 . 31 ). Device according to one of the preceding claims, characterized in that during a positioning of the closure element ( 2 ) in the first position and during the movement from the first position to the second position and vice versa, in particular on the clearly predetermined path, the passage ( 58 ) is locked at least from the inside to the outside with respect to a system to be vented and / or ventilated and only in the second position, a passage through the passage ( 58 ) is possible, at least when predetermined system values which require aeration and / or venting are reached. Device according to one of the preceding claims, characterized in that the closure element ( 2 ) is rotatable. Device according to one of the preceding claims, characterized in that on the base body ( 5 ) in the passage ( 58 ) a filter unit ( 8th ) is trained. Device according to one of the preceding claims, characterized in that on the base body ( 5 ) a fastening section ( 50 ) is provided for attachment to an insertion portion of a system to be vented and / or ventilated. Device according to one of the preceding claims, characterized in that a separating device is provided.

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