EP0061658A1 - Ventilating device - Google Patents

Abstract

The invention relates to a ventilation unit in a frame or the like, the said unit comprising a flow-duct and a slide having a leg which opens and closes the said flow-duct, the said slide being adapted to move at least partly back and forth in the said flow-duct, a stop-surface being associated with the leg which possesses a sealing surface. A ventilating unit of this kind is fitted, for example, in a window-frame or an opening in a wall, the slide providing a satisfactory seal in the closed position, since a major energy loss would otherwise have to be feared. The ventilation unit is to be reliable in operation and to provide reliable sealing. In order to solve this problem, it is proposed that the slide be substantially U-shaped, a second leg having a sealing surface being provided in the flow-duct. This second leg extends over a portion of the structural height of the said flow-duct and a stop-surface is associated with sealing surface of the said second leg, a guide-element for the slide being provided on both longitudinal sides of the said flow-duct. The ventilation unit according to the invention thus comprises at least two sealing surfaces, so that, when the slide is closed, satisfactory sealing is assured. The slide is furthermore reliably guided in a simple manner by the said guide-elements, thus ensuring great reliability.

Description

The invention relates to a ventilation device in a frame or the like with a flow channel and a slide, which has a leg for releasing or shutting off the flow channel, the slide being at least partially movable back and forth in the flow channel and with a sealing surface provided leg is assigned a stop surface.

DE-AS 12 49 489 describes a ventilation device of the type mentioned, which is intended for installation in a window frame, a window sash or in a wall itself. In the known ventilation device, a slide which is movable in the flow channel of the frame is provided, by means of which the flow channel can be released or blocked. If the slide is with. its sealing surface on the associated stop surface, for example on a slotted plate. , the flow channel is blocked. If, on the other hand, the slide is moved away from the slotted plate, the flow channel is released.

Particularly with regard to the high heating and energy costs, there is more than ever the requirement for such a ventilation device to largely prevent air flow in the closed position. In addition, difficulties arise in the known ventilation devices when, in strong winds, the slide is pushed out of the locked position due to a large wind pressure. It can be seen that particularly high energy losses occur precisely because the cold wind or a cold air flow can now get into the interior from the outside.

The invention is therefore based on the object of designing a ventilation device of the type mentioned in such a way that a reliable shut-off is made possible with comparatively little production and cost expenditure. In addition, the ventilation device should only have a relatively low flow resistance when the slide is open. oppose an air flow to allow good ventilation. Furthermore, only a small space requirement and in particular a low overall height should be required for the ventilation device. In addition, the ventilation device should be highly reliable and operationally reliable and be able to meet the operational requirements.

This object is achieved in that the slider is substantially U-shaped, wherein a second leg with a sealing surface is present in the flow channel, that said second leg extends over a fraction of the height of the flow channel, that a sealing surface is assigned to the sealing surface of the second leg, and that a guide body is preferably arranged on each of the two long sides of the flow channel which has guide surfaces assigned to the slide.

The ventilation device according to the invention is characterized by a particularly simple and inexpensive structure and ensures a reliable shutoff of the flow channel. Due to the U-shaped design of the slide, which according to the invention has a second leg, the flow channel can be shut off at two locations spaced apart from one another. In the locked position, an air cushion forms between the two spaced-apart legs of the slide, which acts as an insulating layer between the exterior and the interior. In addition, a labyrinth-like seal is created due to the second leg according to the invention, which has a high flow resistance. The slide can also be produced in a simple manner, especially since no ventilation slots or the like have to be provided in this slide. The fact that the slide and also the guide means for the slide are arranged essentially in the flow channel is via a Functional reliability is guaranteed for a long period of time, especially since the risk of contamination or damage to the guide body or guide surfaces is largely excluded. It should be expressly emphasized that corresponding stop surfaces on the frame or within the flow channel are assigned to the two sealing surfaces according to the invention, these stop surfaces also being able to be arranged in a component with a U-shaped cross section. In all cases, the air flow streaks around the legs of the slide or of the component mentioned in an approximately meandering manner, with noise insulation between the exterior and interior being achieved in a particularly advantageous manner. It should be particularly emphasized that the slide and the associated component may also have more than just two legs, which protrude into the flow channel. With regard to the flow resistance, however, the embodiment with two legs has proven to be particularly advantageous. With increasing number of legs, however, an ever better noise reduction and thermal insulation is achieved, whereby, however, similar to a labyrinth seal, the flow resistance is also increased. Therefore, if special emphasis is placed on noise reduction and thermal insulation, the slide and the associated components of the frame can also have three or more legs in the context of this invention.

The slide is advantageously arranged such that it to shut off the flow channel in the direction of Exterior space is movable to the interior. As is generally known, the air pressure or the wind pressure acts in the above-mentioned direction, so that even when the wind is strong outside, the slider cannot be actuated involuntarily by the wind, but rather is firmly pressed by the wind pressure with its sealing surface onto the stop surface . Annoying rattling or the like is thus avoided.

In a preferred embodiment, the slide has a guide part which bears against an inner wall of the flow channel. Thus, a seal between the guide part and the inner wall of the flow channel is created in a simple manner and in the blocked position of the slide an inadmissible air flow is prevented in the area mentioned.

Slides with sealing surfaces and the stop surfaces advantageously extend substantially over the entire length of the flow channel. The flow channel can thus practically be designed as a comparatively narrow and long slot over a substantial part, for example the width of the window, in order to obtain the necessary flow cross section, with the correspondingly long design of the slide and stop surfaces nevertheless providing a reliable seal or shut-off is guaranteed. Furthermore, such an elongated slide can be produced very easily and inexpensively, for example by extrusion. The slider can thus be manufactured as a long profile rail and then cut to size.

In a preferred embodiment, one leg of the slide extends essentially over the entire height of the flow channel, this leg being moved towards the outside or interior to release it, while the other leg or legs preferably extends over a fraction of the height about two thirds of the height extend. Such an embodiment represents a particularly favorable compromise between low flow resistance and a comparatively good noise reduction between outside and inside.

At least one stop surface is advantageously arranged on a facing grille. Such a veneer grille generally has strips or panels or the like in order to protect the flow channel, at least against coarse dirt, on the one hand, and to obtain a favorable visual impression on the other hand. If the one abutment surface is now arranged on such a veneer grille that is present anyway, a special component for the abutment surface can advantageously be omitted.

Advantageously, the abutment surface on said facing grille extends over a fraction of the overall height, and preferably about a third of the overall height. Thus, the mutual adjustment of the heights of the stop surface and the leg of the slide is achieved in a particularly simple manner, the stop surface itself causing the optical impression of the veneer grille is only slightly affected.

A weather protection strip is advantageously provided above the flow channel and preferably on the outside of the frame. By means of this weather protection strip, the slide to be moved into the outside space, including the leg present there, is protected. Furthermore, such a weather protection strip prevents the ingress of rain and coarse dirt into the flow channel.

In a preferred embodiment, a guide body is arranged on each of the two long sides of the flow channel, which has guide surfaces assigned to the slide. Such a guide body can be produced at low cost and ensures that the slide is guided properly. There is no need to mention that, in the case of a relatively long flow channel, several such guide bodies can also be provided.

Advantageously, the guide part of the slide contains grooves or slots into which preferably bolts arranged in the guide body engage or vice versa. Grooves or slots can be made very easily in the slider or in the guide body and associated bolts can be arranged in the guide body or in the slider without any special manufacturing outlay. A simple and reliable guidance is thus obtained, and tilting or jamming of the slide can practically not occur.

The said grooves or slots are advantageously arranged obliquely or at an angle to the direction of flow, and they may have a predetermined curve shape. At this point it should be emphasized that, depending on the shape of the grooves, the movement according to the invention in the flow direction is also accompanied by a further movement transverse to the same. As a result, the opening or closing process of the slide can be influenced in a simple manner. In particular, when releasing or opening, a relatively long movement path can first be predetermined for the slide in order to obtain a favorable force-displacement ratio.

In a preferred embodiment, the guide body has a shoulder, the height of which corresponds approximately to the height of one leg of the slide. The slide is thus guided on the one hand on the end face of said leg and on the other hand also on its guide part by means of said guide body. It can be seen that the functional reliability is improved by this multiple guidance.

The guide bodies are expediently connected to one another with a connecting element in order to enable a quick and secure installation in the frame or the flow channel. The guide body can easily be glued to a correspondingly long connecting element, which enables simple and reliable adaptation to the respective Lengths and dimensions can be made. In the case of large quantities, on the other hand, it is advisable to produce the guide body and connecting element from a single piece by injection molding or pressing plastic.

The slide is expediently held in the shut-off position by means of a spring element. The slide can therefore be moved against the spring force to release the flow channel by means of a suitable actuating device.

• Fig. 1 eine explosionsartige.Darstellung eines Ausführungsbeispiels mit einem U-förmig ausgebildeten Schieber,
• Fig. 2 einen vertikalen Schnitt durch das Ausführungsbeispiel gemäß Fig. 1, wobei der Schieber in der Absperrposition steht,
• Fig. 3 einen Schnitt ähnlich wie in Fig. 2, wobei jedoch der Schieber in der Offen-Position steht,
• Fig. 4 ein Ausführungsbeispiel, bei welchem der Schieber ausschließlich in dem Rahmen bewegt wird.

Further advantages and features of the ventilation device which are essential to the invention result from the exemplary embodiments explained below with reference to the drawing. Show it:

• 1 is an exploded view of an embodiment with a U-shaped slide,
• 2 shows a vertical section through the exemplary embodiment according to FIG. 1, the slide being in the shut-off position,
• 3 shows a section similar to FIG. 2, but with the slide in the open position,
• Fig. 4 shows an embodiment in which the slide is moved exclusively in the frame.

Fig. 1 shows an exploded view of a ventilation device with a slide 2, which on two guide bodies 4 can be moved back and forth at least in the direction of arrow 6. The slide 2 contains in its central guide part 8 two slots 10, in which bolts 12 of the guide body 4 engage. The slots 10 run obliquely to the direction of arrow 6 with the result that the slide 2 can also perform a movement transversely to the direction of arrow 6. A curved shape of the slots mentioned is indicated by dash-dotted lines, as a result of which a favorable adaptation of the force required to move the slide 2 to the path covered can be achieved. So it can be particularly useful to initially provide small distances for the movement when moving the slide from the shut-off position to the open position. The direction of the arrow 6 coincides with the direction of flow of the air flowing through the ventilation device. The slide 2 has two legs 14, 16 which are connected to one another by the central guide part 8. The guide part 8 has a lower guide surface 18 with which the slide 2 rests on the guide surfaces 22 of the guide body 4. The end face of one leg 16 is also designed as a guide surface 20, which rest on further guide surfaces 24 of the guide body 4. It can be seen that a functionally reliable guidance of the slide 2 is thus ensured. The guide bodies 4 are connected to one another by means of a connecting element 26. The guide body and connecting element are expediently made from a single piece, in particular by injection molding or pressing a suitable plastic, manufactured. The guide bodies 4 are approximately stepped, a shoulder 28 being present between the guide surfaces 24 and 22. There is also a facing grid 30 which is connected to the guide bodies 4 by means of screws 32 or other connecting elements. For this purpose, the guide bodies 4 have bores 36 in their end faces 34. If the slide 2, as indicated by the dash-dotted lines, is placed on the guide body, it is in the shut-off position. By contrast, the open position is indicated by the thin lines. It can be seen that the slide 2 with its guide surfaces 18, 20 is reliably guided by means of the guide surfaces 22, 24 of the guide body 4 when moving from one position to the other and that tilting or jamming is avoided with certainty.

FIG. 2 shows a section through the ventilation device according to FIG. 1, which is now installed in a frame 38, in particular a window or the like. The slide 2 is in a flow channel 40, which basically represents a connection between the outer space 42 and the inner space 44. It should be particularly pointed out that the ventilation device is installed directly in the frame 38 or the flow channel, without additional components such as a housing being required. The material and cost savings achieved with this are obvious. The outer leg 14 of the slide 2 extends over the entire height H of the flow channel 40. The slide 2 or its guide part 8 bears directly on the upper inner wall 46 of the flow channel 40 or on the frame 38. As already stated above, the slide 2 rests on the two guide bodies 4. The guide bodies 4 are each arranged on the long sides of the flow channel, only one guide body being shown here, of course. The leg 14 rests with its sealing surface 48 against a stop surface 52 of the connecting element 26 via a sealing element 50. The sealing element 50, like the entire slide 2, extends in the longitudinal direction, that is to say here perpendicular to the plane of the drawing. It should also be particularly emphasized that 4 stop surfaces are also formed by the guide bodies arranged at the respective ends of the flow channel, which are assigned to the sealing surfaces of the slide 2 present on the lateral edges. Since the slide 2 rests with its guide part practically uncut on the inner wall 46, a good seal is also achieved there. The arrow 54 indicates that, in the position of the slide 2 shown, practically no air exchange can take place between the outer space 42 and the inner space 44. A weather protection strip 56 is also provided on the outside 42 to prevent the ingress of rain or snow. The facing grid 30 has a second stop surface 58, which extends approximately over the lower third of the total height H, on which the slide 2 bears with its leg 16 or its sealing surface 60 there. Because of the U-shaped Forming the slide is thus achieved a double seal in connection with the two fixed or connected to the frame 38 stop surfaces 52, 58. A spring element 62 is also provided, which is connected on the one hand to the slide 2 and on the other hand to the guide body 4 or, if appropriate, also directly to the frame 38 in order to hold the slide 2 in the illustrated shut-off position. The wind pressure indicated by the arrow 54, like the spring element 62, acts on the slide 2 in such a way that it is pressed into the shut-off position.

3 shows the ventilation device with the slide 2 in the open position, in which the flow channel 40 is released and the connection between the outer space 42 and the inner space 44 is established. Thus, according to arrow 64, an air flow from the outside 42 to the inside 44 can occur. It does not need to be explicitly mentioned that the air flow can of course also take place in the opposite direction. If one starts from the flow direction shown, the slide 2 would be moved from the shut-off position shown in FIG. 2 to the open position according to FIG. 3 by movement essentially counter to the flow direction. Suitable actuating devices are available for this purpose, which will not be explained further here. According to arrow 64, the air flow winds through the ventilation device in an approximately meandering manner, with the deflections also resulting in a not inconsiderable reduction in noise between the outside and the inside. It is particularly important here that practically no appreciable flow resistance is achieved in area 66, that is to say in the entry area of the air flow, because the slide 2 is pushed through the distance L into the outer space 42, L being equal to, even greater than the total height H of the flow channel 40. In the central area 68 of the flow channel 40, however, there is a cross-sectional constriction and the air flow subsequently passes through the veneer grille 30 into the interior 44. The sealing element 70 can also be seen on the guide body 4, by means of which a reliable seal is provided in the shut-off position is reached at the end of the flow channel 4. It should be expressly pointed out that, in a preferred, alternative embodiment, the second stop surface 58 cannot be arranged on an additional facing grille, but on a connecting strip which is attached directly to the end faces 34 or is even made with this in one piece.

FIG. 4 schematically shows an exemplary embodiment of a ventilation device whose slide 2, which is essentially movable in the flow direction, has three legs 72, 74, 76. A component 78, which is fixedly connected to the frame 38, is arranged in the flow channel 40 and basically has the same structure as the slide 2. In the illustrated shut-off position, the legs of the slide 2 and the component 78 are aligned with one another. The slide 2 and also the component 78 have a lining 80, 82 made of noise-protecting material between the legs. The linings 80, 82 are expediently like in their surfaces shown, executed rounded, so as not to oppose too much resistance in the open position of the air flow. A facing grille 84 with weather protection strips 86 is also provided for the outer space 42. In this embodiment, the slide 2 is arranged entirely within the flow channel 40, and it is also in the open position there. It should be emphasized that in this exemplary embodiment, as shown, the sealing surfaces of the slide 2 in the shut-off position are diametrically opposed to the stop surfaces or sealing surfaces of the component 78 firmly connected to the frame 38, between the legs of the slide 2 and the component 78 there are practically no gaps.

It is not necessary to explicitly mention that corresponding recesses are provided in the lining 80 in the region of the guide bodies which are also present at the ends of the flow channel.

Reference symbol list

• 2 sliders
• 4 guide bodies
• 6 arrow
• 8 guide part
• 10 slots
• 12 bolts
• 14, 16 legs
• 18, 20 guide surfaces of 2
• 22, 24 guide surfaces of 4
• 26 connecting element
• 28 paragraph
• 30 facing grille
• 32 screws
• 34 end face
• 36 holes
• 38 frames
• 40 flow channel
• 42 outdoor space
• 44 interior
• 46 inner wall
• 48 sealing surface
• 50 sealing element
• 52 stop surface
• 54 arrow
• 56 Weather protection strip
• 58 contact surface
• 60 sealing surface
• 62 spring element
• 64 arrow
• 66 area
• 68 middle area
• 70 sealing element
• 72, 74, 76 legs
• 78 component
• 80, 82 linings
• 84 facing grille
• 86 Weather protection strip

Claims (18)

1. Ventilation device in a frame or the like. With a flow channel and a slide which has a leg for releasing or shutting off the flow channel, the slide being at least partially movable back and forth in the flow channel and the leg provided with a sealing surface having a stop surface is assigned, characterized in that the slide (2) is substantially U-shaped, a second leg (16) with a sealing surface (60) being present in the flow channel (40) such that the second leg (16) overlaps extends a fraction of the overall height (H) of the flow channel (40), that the sealing surface (60) of the second leg is assigned an abutment surface (58) and that a guide body (4) is preferably provided on the two long sides of the flow channel (40) ) is arranged which has guide surfaces (22, 24) assigned to the slide (2). 2. Ventilation device according to claim 1, characterized in that the slide "(2) for shutting in the direction from the outer space (42) to the interior (44) is movably arranged. 3. Ventilation device according to claim 1 or 2, characterized in that the sliding. (2) has a guide part (8) which bears against an inner wall (46) of the flow channel (40). 4. Ventilation device according to claim 1 or following, characterized in that the slide (2) with its sealing surfaces (48, 60) and the stop surfaces (52, 58) extend substantially over the entire length of the flow channel (40). 5. Ventilation device according to claim 1 or following, characterized in that the slide (2) for releasing with a leg (14) in the outer space (42) or the inner space (44) is pushed to the flow channel (40) as completely as possible to release. 6. Ventilation device according to claim 1 or following, characterized in that one leg (14) of the slide (2) extends substantially over the entire height (H) of the flow channel (40), this leg for releasing into the outer space (42nd ) or into the interior (44) while the other leg (s) (16) extend over a fraction of the overall height (H), preferably about 2/3 of the overall height. 7. Ventilation device according to claim 1 or following, characterized in that at least one stop surface (58) is arranged on a facing grille (30). 8. Ventilation device according to claim 1 or following, characterized in that the stop surface (58) extends over a fraction of the height (H), preferably about 1/3 of the height. 9. Ventilation device according to claim 1 or the following, characterized in that a weather protection strip (56) is arranged above the flow channel (40), preferably on the side of the outer frame (42), on the frame (38). 10. Ventilation device according to claim 1 or following, characterized in that a guide body (4) is preferably arranged on the two longitudinal sides of the flow channel (40), which guide slide (2) associated with the slide (2) and preferably also at least one Has stop surface (52). 11. Ventilation device according to claim 1 or following, characterized in that the guide part (8) of the slide (2) has grooves or slots (10), in which preferably arranged in the guide bodies (4) engage bolts (12) or vice versa. 12. Ventilation device according to claim 11, characterized in that the guide grooves or slots (10) are arranged obliquely to the flow direction and / or arcuately. 13. Ventilation ^device according to claim 1 or following, characterized in that the guide body (4) has a shoulder (28), the height of which corresponds approximately to that of the associated leg (16) of the slide (2). 14. Ventilation device according to claim 1 or the following, characterized in that the guide bodies (4) preferably have recesses formed as bores (36), in which for fastening the facing grids (30) fasteners (32) are introduced. 15. Ventilation device according to claim 1 or following, characterized in that the guide body (4) with a connecting element (26) connected and are preferably made from a single piece. 16. Ventilation device according to one of claims 1 or following, characterized in that the slide is held in the shut-off position by means of a spring element (62). 17. Ventilation device according to claim 1 or following, characterized in that between the sealing surfaces (48, 60) of the slide (2) and the stop surfaces (52,58) sealing elements (50) are provided. 18. Ventilation device according to claim 1 or following, characterized in that the guide body (4) and slide (2) are installed directly in the flow channel (40) of the frame (38).

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