WINDOW WITH ONE VENTILATION DUCT

Description

[0001] The invention relates to a window with a ventilation duct, according to the preamble of claim 1.

[0002] Such a window, which allows sound-insulated ventilation when the sash is tilted or turned, is known per se, for example from DE 10 2016 115 422.

[0003] However, the generic construction has a relatively complicated structure and should therefore be further optimized in this respect as well as with regard to various other properties, in particular sound insulation. The invention achieves this objective through the subject matter of claim 1. A window is created, in particular a tilt window, a casement window, a turn-and-tilt window, or a parallel-opening window, which has at least the following features: a frame composed of several frame profiles, a sash frame composed of several frame profiles, which has at least one surface element and which is movable at least between a closed position and a ventilation position relative to the frame, wherein a circumferential frame rebate space is formed between the frame profiles of the frame and the sash, at least one ventilation duct formed in at least one of the frame profiles of the frame,which has a first ventilation duct opening and a second ventilation duct opening, and wherein the sash frame and the frame are designed to close at least one of the ventilation duct openings in the first closed position and to release both ventilation duct openings of the at least one ventilation duct in the second position.

[0004] It is further provided that at least the at least one frame profile of the window frame, in which the at least one ventilation duct is formed, is designed as a multi-chamber hollow profile which consists entirely or substantially entirely of plastic, wherein the walls lying to adjacent rooms of the window are made of plastic.

[0005] Plastic frame profiles, e.g., made of rigid PVC, are significantly less expensive than aluminum composite constructions. Due to the material and preferably a "multi-chamber structure" with more than three hollow chambers—especially from inside to outside or from room II to room I—PVC profiles, in particular, have excellent thermal properties and, if appropriately designed with sufficient hollow chambers, can also be designed to meet passive house requirements. The "multi-chamber structure" can also ensure excellent structural stability even in designs without reinforcement and / or without a reinforcing insert.

[0006] Partition walls can be formed or arranged much more easily in plastic profiles than in aluminum profiles. Multiple hollow chambers are advantageous for sound insulation. This creates a favorable mass-spring-mass system, with the profile walls providing the mass and the air between the walls providing the spring. The more hollow chambers, the better the sound absorption. This applies to both the horizontal and vertical division of the walls.

[0007] The outer profile walls (sheathing) can have thicker walls, preferably 2-4 mm. In contrast, the inner profile walls can be relatively thin, e.g., 1-2 mm. This is advantageous because it contributes to sound and thermal insulation.

[0008] Another particularly preferred frame profile, in which the ventilation duct can be formed, has hollow chambers of different sizes with slanted partition walls—i.e., non-parallel partition walls. The walls are preferably constructed asymmetrically. The connection points of the partition walls to other walls—e.g., one or more exterior walls—are then spaced at different distances from each other. Standing sound waves thus interfere destructively. Vibrations are reduced.

[0009] Preferably, frame profiles are used whose material has a thermal conductivity of less than 1.0 W / mK. This is also advantageous, as it contributes to good thermal insulation.

[0010] According to a further development, it can advantageously be provided that all of the multi-chamber profiles of the frame and / or the sash frame consist entirely or substantially entirely of plastic.

[0011] According to a further option, one or more of the essentially plastic multi-chamber hollow profiles of the frame and / or the sash can have at least one reinforcement insert. The reinforcement insert can be designed as a metal profile, for example, a tube. It is advantageous if steel tubes, e.g., square tubes, are simply inserted and screwed into the PVC profiles as reinforcement inserts.

[0012] It can also be provided that a reinforcement, e.g. made of metal, is made in coextrusion with the multi-chamber hollow profile made of plastic.

[0013] A version with coextruded reinforcement is particularly advantageous. This requires no additional assembly steps. Only a recess in the profile's rebate for the installation of a ventilation cassette may be required. The ventilation cassette is simply clipped into the recess and / or secured with screws.

[0014] It is provided that at least two sealing levels, preferably at least three sealing levels, are formed between the frame and the sash in the area of the frame rebate space in the closed state.

[0015] In particular, it is provided that at least one of the sealing planes is formed between the frame and the sash in the area of the frame rebate when opened. It can also be advantageously and simply provided that two of the sealing planes are formed by stop seals between the frame and the sash.

[0016] It is further provided that one of the sealing levels is formed by a central seal between the frame and the sash. It is preferred that the central seal be designed to form the sealing level remaining in the frame rebate space in the ventilation position and to divide the frame rebate space into two frame rebate space sections, so that in the ventilation position, air can be exchanged between the two frame rebate space sections essentially only through the ventilation duct.

[0017] It can further be provided that the central seal is attached to the frame and, in particular, is in contact with the sash frame in the ventilation position. Alternatively, it can also be provided that the central seal is attached to the sash frame and, in particular, is in contact with the frame in the ventilation position.

[0018] The center seal can be designed as a single piece with the sliding seal or separately. The three sealing levels optimize heat transfer, sound insulation, and air / moisture tightness.

[0019] Preferably, the stop seals and / or the center seal are seals that are inserted and held in retaining grooves. Such seals are relatively inexpensive and, above all, easy to install. They can be installed all the way around without requiring any cutting in the corners. Their arrangement in retaining grooves allows for easy replacement. The seals can also be welded together.

[0020] Small, thin-walled seals offer minimal resistance to the seal stops. Furthermore, they are less susceptible to tolerances. This advantageously minimizes the operating forces of the element.

[0021] The stop seals (inside / outside) and the center seal are preferably formed circumferentially, i.e. on four sides of the frame, while the sliding seal / sliding seal lip (separately or integrally with the center seal) is arranged only on one side (opposite the tilt axis) or preferably on three sides (except on the tilt axis).

[0022] Preferably, the center seal can be designed as a lip seal with one or more sealing lips, each of which is relatively thin and flexible. This advantageously eliminates the need for a large-volume, multi-chamber center seal.

[0023] The seals are preferably made of weldable TPE or EPDM. This allows profiles with inserted seals to be welded to form frames simultaneously. The sliding seal is designed with multiple joints and features a curved sliding surface, which, together with the sliding strip attached to the frame, forms a particularly favorable friction pairing. The surface structures and material combination are important to achieve optimal results.

[0024] The relatively small opening width (barely noticeable when activated) in the aforementioned prior art is achieved by the closing means, the insulating strip. This has only a limited length. In the design according to the invention, the sliding seal lip closes the gap between the frame and sash up to the outer edge of the sash profile. This achieves a larger opening width ("W"). Depending on the profile width ("B"), 50 to 80 mm is preferably achieved. The geometry of the sliding seal, in particular the length of the sealing lip, is also crucial. Overall, even larger widths are therefore possible. A width of 55 to 65 mm is particularly preferred. The formula for a maximum opening width for soundproof ventilation could be assumed to be Wmax. = B - 25 mm.

[0025] A significantly larger number of hollow chambers (see above) has a beneficial effect on sound insulation.

[0026] The central seal is provided with a sealing base and a sealing section pivotally mounted on the sealing base. This sealing section is preferably designed as a pivotable sealing lip. The sealing section—in particular the sealing lip—can be hingedly connected to the sealing base.

[0027] A slide strip is arranged on one of the sash frame's multiple frame profiles, against which the central seal rests in the ventilation position. The sealing section rests against the sash frame at its free end with a contact sliding section, at least in the area(s) in which a respective ventilation duct is formed. It is then further provided that the contact sliding section rests against the slide strip in the ventilation position, thus sealingly dividing the frame rebate space. By using the contact sliding section and the slide strip, the friction of the sliding seal on the sash frame can be reduced. This means that the material and surface structure are matched to one another. The sliding seal preferably has a roughened surface structure on the sliding side. The slide strip is preferably characterized by a sliding coating. The surface structure can of course also be designed the other way around.It can therefore be provided that the contact sliding section has a roughened surface structure on the sliding side and / or that the sliding strip has a sliding coating or that the sliding strip has a roughened surface structure on the sliding side and / or that the contact sliding section has a sliding coating.

[0028] According to a structurally simple variant, the one or more ventilation ducts can be formed in a ventilation cassette that is / are inserted into the frame or sash, or into the respective frame profile or sash profile. This significantly simplifies the formation of the ventilation duct, as it does not have to be laboriously formed directly in the hollow chamber profiles. Instead, it is sufficient to provide or form a recess there and then insert the pre-assembled ventilation cassette into the recess, e.g., by snapping or clamping it into place.

[0029] The respective ventilation cassette can be inserted in a simple manner and preferably in a manner not visible from the outside in the closed position into a recess of the respective frame profile or the respective sash frame profile facing the frame rebate space.

[0030] It can also be advantageous for each ventilation cassette to have ventilation duct openings aligned with the frame rebate. It can be particularly advantageous for the ventilation duct openings to be located entirely within the frame rebate between the stop seals when closed. This does not change the external appearance of the window. The preferred design remains intact. Furthermore, the ventilation cassettes can be easily replaced. This is necessary approximately annually to meet cleanliness requirements (dust, insects, etc.). No specialist is required for replacement.

[0031] It is structurally advantageous and simple if the central seal is arranged on the ventilation cassette, in particular on a groove of the ventilation cassette.

[0032] In order to achieve good thermal insulation, it can be provided that the frame profiles, with the exception of the reinforcements, are made of a plastic that has a thermal conductivity of less than 1.0 W / mK.

[0033] It can further be provided that the sash can be moved by 50 to 80 mm relative to the frame at least at one point when moving from the closed position to the ventilation position.

[0034] Overall, advantageously high sound insulation values of more than 32 dB (decibels) can be achieved.

[0035] The air exchange at 2 PA (Pascal air pressure) can be more than 12 m 3 < / h (preferably >14), at 10 PA >25 m 3 < / h (preferably > 28).

[0036] Synthetic microfibers, which are capable of filtering pollen, are preferably installed in the ventilation cassettes. This is particularly beneficial for allergy sufferers.

[0037] The invention also provides an advantageous method for forming a ventilation duct in a window according to one or more of the claims related thereto, wherein a frame profile is provided, wherein a recess facing the frame rebate space is then formed in the respective frame profile, in which a ventilation duct is to be formed and that a ventilation cassette is interchangeably inserted into the respective recess facing the frame rebate space of the respective frame profile or the respective sash frame profile.

[0038] This makes manufacturing simple and cost-effective. After installation in a building opening, a corresponding sash can be inserted into the assembled frame at the installation site. The center seal can be attached to the ventilation cassette and the remaining frame after installation. It is simply removed when replacing the cassette. A particular advantage is that installation can usually be accomplished with a single insertion movement parallel to the pane plane, which is simple and convenient.

[0039] This cassette can be cleaned and / or replaced at a specified interval, for example, after one or more years. The ventilation cassette can be attached to the frame in a variety of ways, such as clamping or, preferably, with a fastening device such as at least one screw. It is also conceivable to replace the filter material in the ventilation cassette if the ventilation cassette is equipped with such a material.

[0040] Advantageous embodiments of the invention can be found in the remaining subclaims.

[0041] The invention is described in more detail below using exemplary embodiments with reference to the drawings. The invention is not limited to these exemplary embodiments but can also be implemented in other ways, either literally or in other equivalent ways. They show: Fig. 1 in a) and b) each show a section through an upper horizontally running section of a first window according to the invention, for example in the installed state, the window being shown in a closed or locked position and in b) in a ventilation position; Fig. 2 in a) and b) each show a section through an upper horizontally running section of a second window according to the invention, for example in the installed state, the window being shown in a closed position and in b) in a ventilation position; Fig. 3 in a) and b) each show a section through an upper horizontally running section of a third window not according to the invention, for example in the installed state, the window being shown in a closed position and in b) in a ventilation position.

[0042] Fig. 1shows a section of a window. This window has a surrounding frame 1. This is composed of several frame profiles 1'.

[0043] A sash that is movable relative to the frame 1 is arranged on the frame 1. The sash preferably has a circumferentially closed sash frame 2 and a surface element 3, such as a pane, that is inserted into the sash frame 2 and received thereby. The sash frame 2 is composed of several sash frame profiles 2'.

[0044] The frame profiles 1' and / or the sash frame profiles 2' are designed as multi-chamber hollow profiles.

[0045] A circumferential frame rebate space F is formed between the frame 1 and the sash frame 2 or their frame profiles 1', 2'. This frame rebate space F essentially extends between the outer perimeter of the sash frame 2 and the inner perimeter of the frame 1.

[0046] The window serves to open and close a room opening in a building (not shown here), whereby a room I (e.g., a surrounding room of a building) is separated from a room II (e.g., an interior room of the building). In the following, the terms "frame profile 1" and "frame 1" as well as "sash frame profile 2" and "sash frame 2" are used synonymously. This is because the means and configurations discussed below can each preferably be formed circumferentially on the frame 1 or the sash 2. They can be formed on only one of the corresponding frame profiles of the sash 2 and the frame 1 (e.g., on the frame profiles opposite a hinge axis) or on several of the corresponding frame profiles of the sash 2 and the frame 1. On the perpendicular to the Fig. 1bIn the ventilation position, corresponding gaps are also formed on the sides of the window frame, but these gaps do not have a constant width when pivoted open. However, in order to improve the ventilation effect, ventilation ducts 8 can also be installed on these sides, in accordance with the type of Fig. 1a and 1b also be trained.

[0047] The sash frame 2 can have a contact web 4 - preferably towards one side or towards an adjacent room II - with which it rests against the frame 1 in the closed position, either directly or via a stop seal 5 attached to the sash frame 2. Similarly, the frame 1 can have a contact web 6 - preferably towards the other side or towards the other adjacent room I - with which it rests against the frame 1 in the closed position, either directly or via a stop seal 7 attached to the contact web 6. In this way, a gap SII and a gap SI between the frame rebate space F and the room I or II are tightly closed.

[0048] It is provided that at least in the frame 1, a ventilation duct 8 (shown in dashed lines) is formed, which has a first ventilation duct opening 9 and a second ventilation duct opening 10. It is preferably provided that the ventilation duct openings 9 and 10 open into the frame rebate space F. The ventilation duct 8 can have a U-shape.

[0049] It is further provided that at least the hollow profile(s) of the frame 1 or the sash frame 2, in each of which the ventilation duct 8 is formed, are designed as multi-chamber hollow profiles made of plastic.

[0050] These multi-chamber hollow profiles made of plastic preferably have three or more hollow chambers H1, H2, .... between the room side I and the room II. According to the embodiment of the Fig.1Seven hollow chambers H1 to H7 are provided between Room I and Room II ("from inside to outside"). Additional hollow chambers can also be formed perpendicular to the direction I-II, particularly in the area of the landing bridges. These measures, individually and in combination, ensure very good thermal insulation properties. The partition walls between the hollow chambers inside the profiles are preferably thinner than the outer walls, especially towards Room I and Room II.

[0051] One or more additional hollow chambers H8, H9, H10, H11 may be provided. One or more of these additional hollow chambers H8, H9 can advantageously be provided in the respective landing stage 4 or 6. These measures, individually or jointly, further improve soundproofing and thermal insulation.

[0052] It can also be provided that all hollow profiles of the frame 1 or the sash frame 2 are designed as multi-chamber hollow profiles made of plastic.

[0053] A wide variety of plastics are suitable. PVC is particularly preferred.

[0054] It can also be further provided that one or more of the multi-chamber hollow profiles made of plastic of the frame 1 and / or one or more of the multi-chamber hollow profiles made of plastic of the sash frame 2 has / have at least one reinforcing reinforcement 11, 12 or several reinforcing reinforcements 11, 12.

[0055] The respective reinforcement reinforcement 11, 12 can be made of a different material than the multi-chamber hollow plastic profile, for example, of a metal, in particular steel, and can be designed as a metal profile, for example, as a metal strip or metal plate or the like. However, it can also be designed as a reinforcement reinforcement made of a different plastic, for example, a glass-fiber-reinforced plastic.

[0056] The multi-chamber profiles then preferably have a continuous plastic outer wall towards a first room side I and preferably have a continuous plastic outer wall towards a second room side II.

[0057] It is further preferred that the ventilation duct 8 is formed in a recess 13, in particular in a milled recess formed in the frame 1 or the sash 2 starting from the frame rebate space.

[0058] It can further advantageously be provided that the ventilation duct 8 is formed in a ventilation cassette 14, which is inserted into the recess 13, in particular into the milled recess, in the frame 1 or the sash 2. Several of these ventilation cassettes 14 can also be provided per frame profile or on several sides of the frame (not shown). The ventilation duct 8 can thus be formed simply in just one or in several of the profiles of the surrounding frame 1 or the sash 2.

[0059] It can preferably be provided that the respective ventilation cassette 14 has a channel- or trough-like base element 15. It can further be provided that the respective ventilation cassette 14 has a cover 16.

[0060] Preferably, the cover 16 is directed towards the frame rebate space F.

[0061] A central seal 18 is formed on the frame profile, which extends into the frame rebate space F. The central seal 18 can be attached to the ventilation cassette 14, in particular to the cover 16. For this purpose, a fastening means, in particular an undercut groove 17, for the central seal 18 can be formed on the ventilation cassette 14, in particular on the cover 16.

[0062] The central seal 18 has a sealing base 20 with a sealing foot 21 that is inserted into the groove. The seal 18 further has a sealing section 22 pivotally attached to the sealing base 20. This can be designed as a single sealing lip ( Fig.1a and 1b ) or as a combination of two or more sealing lips ( Fig. 2a and b). The sealing section 22 can in particular have a sealing lip which is curved in itself and / or has another joint section, so that it is divided into two lip regions which are movable relative to one another and which connect to form a longer lip.

[0063] It is particularly advantageous if the sealing section 22 is pivotable relative to the sealing base 21 and is long enough to rest against the sash frame 2. It preferably rests there with one end section. This end section can be curved.

[0064] The sealing section 22 can have a contact sliding section 23 as an end section, which rests on the corresponding frame profile, here the sash profile, and can slide smoothly during relative movements between the frame 1 and the sash 2. This results in a harmonious, easy opening movement that is not significantly hindered by the adjacent sealing surface.

[0065] The sliding section 23 is provided on the central seal where a ventilation duct 8 is also provided in the respective frame profile. This can be on one side of the frame 1 or sash 2 or on several sides, preferably three sides. If the window is a tilt-hung window, no ventilation duct is preferably provided on the side where the tilt axis is located. In this case, the sliding section 23 can be omitted.

[0066] It is particularly advantageous that the sealing section 22 is preferably so long that it remains in contact with the sash frame 2 over a certain opening angle when the sash is opened or at least is or comes into contact with the sash frame 2 in a ventilation position to be explained below, so that it divides the frame rebate space F in the ventilation position into two areas, between which air exchange takes place essentially only via the ventilation duct 8.

[0067] The central seal 18 thus divides the frame rebate space F into a first and a second area FI, FII (corresponding to the orientation to the rooms I and II), between which an exchange of air is only possible via the ventilation duct 8 formed in the frame 1.

[0068] Alternatively, if the ventilation duct 8 is arranged in the frame 1, it can be provided that the central seal is attached to the sash frame 2 and extends to the frame 1 (see Fig. 3 ). Even then, the sealing section 22 should preferably be so long that it remains in contact with the frame 1 over a certain opening angle when the sash is opened, or at least is or comes into contact with the frame 1 in a ventilation position to be explained later, so that it divides the frame rebate space F in the ventilation position into two areas, between which air exchange takes place essentially only via the ventilation duct 8.

[0069] It should be noted again at this point that the arrangement can also be "completely" reversed, in which case the ventilation duct is located in the sash frame 2. The arrangement of the central seal 18 can then be from the sash frame 2 to the frame 1 or vice versa. However, such an arrangement does not fall under the subject matter of claim 1 and is therefore not in accordance with the invention.

[0070] In the ventilation position L of the Fig. 1b the sash was moved into an opening position relative to the frame 1, in particular pivoted and / or shifted.

[0071] This opening position is a ventilation position. It may—but is not necessarily—correspond to the maximum achievable position when tilting, rotating, or similar.

[0072] Gaps SI and SII are open in this position because the stop seals 5 and 7 are no longer in contact with the frame 1 or sash 2, respectively. The center seal 18 is still in contact with the sash 2. The sash is still partially within the perimeter defined by the frame 2. Since the center seal 18 blocks the direct transition between rooms FI and FII, air exchange between these rooms FI and FII, and thus also air exchange between rooms I and II, can only occur through the ventilation duct. This provides a highly advantageous combination of ventilation and soundproofing.

[0073] For example, if room I is the ambient space of a building and room II is an interior space II of the building, air can flow through the gap SI, the frame rebate space section FI, the ventilation duct 8, the frame rebate space section FII, and the gap SII into the interior space I. The sound is advantageously insulated, particularly by redirecting the direction of the ventilation duct.

[0074] This means that, preferably within the ventilation duct, the air flowing through it should change direction once or several times. This has a positive effect on sound insulation.

[0075] The ventilation duct 8 has the first ventilation duct opening 9 and the second ventilation duct opening 10. These two ventilation duct openings 9, 10 can be formed in the ventilation cassette 14. Preferably, the two ventilation duct openings 9, 10 are formed in the cover 16.

[0076] It can further advantageously be provided that one or particularly preferably both ventilation duct openings 9, 10 are aligned towards the frame rebate space F.

[0077] Within the ventilation cassette 14, at least one wall 19 can be formed, which divides the ventilation cassette interior into sections. This wall 19 can have at least one passage 19a. One of the ventilation duct openings 9, 10 is then located in each of the sections.

[0078] In a preferred embodiment, the ventilation duct 8 runs approximately U-shaped within the ventilation cassette 14 (or even without a ventilation cassette). It extends from the first ventilation duct opening 9 approximately parallel to the surface element 3 into the ventilation cassette 14, then runs approximately perpendicular to the surface element 3, extends there through the passage 19a of the wall 19 and runs again approximately parallel to the surface element up to the ventilation duct opening 10. In this way, the direction of the air flowing through changes several times. This insulates or prevents the passage of sound from room I to room II and vice versa. Nevertheless, an air flow for ventilation from room I to room II II pass through.

[0079] It may further be provided that a sliding strip 24 is arranged on the sash frame 2 or on its sash frame profiles 2', where no ventilation duct 8 is provided. The central seal 18 can then rest against this in the ventilation position L.

[0080] It can advantageously be provided that the slide rail 24 is positioned relatively far to the side and / or in a corner area of the respective sash frame profile 2'. This corner area is preferably the corner area that is closest to the corresponding frame profile 1' in the opening and ventilation position. For example, the slide rail can be positioned laterally outside an area defined by the inner and outer edge planes of the insulating glass pane.

[0081] In this way, a relatively large opening width can be achieved in a particularly advantageous manner, in which air can essentially only be exchanged between room I and room II via the ventilation duct 8.

[0082] The slide bar 24 can be made of metal or another material such as plastic. It can also have at least one hollow chamber.

[0083] The sliding strip 24 can also advantageously be designed as a shoulder strip which is fixed to the respective sash frame profile 2' by means of a fastening, for example a tongue and groove connection.

[0084] The frame profiles, especially the exterior walls of Rooms I and II, are made of a plastic material, preferably PVC. They are preferably made entirely of plastic—except for internal reinforcement profiles or reinforcement bars, if necessary. They can be constructed in one piece, especially if they are made of plastic.

[0085] The outer walls of the hollow chamber profiles made of plastic preferably have a thickness of 2 - 4 mm, while the thickness of the partition walls forming hollow chambers H1 - H7 can be 1 - 2 mm.

[0086] In a preferred embodiment, for static reinforcement, additional reinforcing reinforcements 10, 11 made of metal are optionally arranged in the hollow chambers and further subdivide them.

[0087] Particularly preferred frame profiles 1', 2' are those with embedded reinforcement profiles, which are manufactured by a coextrusion process, wherein the reinforcement reinforcements consist of aluminum or fiber-reinforced plastic.

[0088] It is preferably provided that the stop seals (inside / outside) 5, 7 and the central seal 18 are designed to be circumferential, i.e. they run on four sides of the frame, while the sealing section is not provided on all sides of the frame.

[0089] The seals—here seals 5, 7, and 18—can advantageously be made of weldable TPE or weldable EPDM. This allows profiles with inserted seals to be welded to form frames at the same time.

[0090] The central seal with the contact sliding section 23 is designed with multiple joints and features a curved sliding surface, which, together with a sliding strip 24 attached to the sash frame (or frame 1), forms a particularly favorable friction pairing. The surface structures and the material combination are important to achieve optimal results.

[0091] In the construction according to the invention, the sliding section 23 closes the frame rebate space, or gap between the outer and sash frames, up to the outer profile edge of the sash frame 2. This achieves a larger opening width ("W") compared to the prior art. Depending on the profile width ("B" between room I and room II), 50 to 80 mm is preferably achieved. The geometry of the sliding seal, in particular the length of the sealing lip, is also advantageous. Overall, relatively large opening widths in the ventilation position can be achieved in this way. A width of 55 to 65 mm is particularly preferred. The formula for a maximum opening width for sound-insulated ventilation can be assumed to be: Wmax. = B - 25 mm.

[0092] A significantly larger number of hollow chambers compared to an aluminum composite construction has a beneficial effect with regard to sound insulation.

[0093] By using the slide strip 24, the friction of the sliding seal on the sash frame can be reduced to a minimum. This means that the material and surface structure are matched. The sliding seal preferably has a roughened surface structure on the sliding side. The slide strip is preferably characterized by a sliding coating. The surface structure can, of course, also be reversed.

[0094] The inner chamber H7 is preferably not used directly as a ventilation duct, as this is not advantageous for sound insulation reasons. Instead, two chambers can be formed between the ventilation cassette wall and the exterior, which are preferably separated from each other by an aluminum wall.

[0095] After Fig. 2a and b is complementary to the construction of the Fig. 1a and bIt is provided to form a further sealing lip 25 on the central seal 18 on the sealing base 20, which seal lip rests against the sash frame 2 in the closed state, so that four sealing levels are advantageously formed in the frame rebate space between the frame and the sash frame. Reference symbol

[0096] frame 1 sash frame 2 Surface element 3 jetty 4 Stop seal 5 jetty 6 Stop seal 7 ventilation duct 8 first ventilation duct opening 9 second ventilation duct opening 10 Reinforcing reinforcement 11, 12 recess 13 cassette 14 Basic element 15 cover 16 Nut 17 Central seal 18 Wall 19 passage 19a Sealing base 20 Sealing base 21 Sealing section 22 Plant sliding section 23 Slide bar 24 sealing lip 25 Hollow chambers H1, H2, .... Folding space F Fold space section FI, FII gap SI, SII

Claims

1. Window, comprising at least the following features: a. a window frame (1) composed of a plurality of frame profiles (1'), b. a sash frame (2) composed of a plurality of frame profiles (2') which has at least one surface element (3) and which is movable relative to the window frame (1) at least between a closed position and a ventilation position, c. wherein a continuous frame rebate space (F) is formed between the frame profiles (1', 2') of the window frame (1) and the sash frame (2), d. at least one ventilation duct (8) formed in at least one of the frame profiles (1') of the window frame (1), which has a first ventilation duct opening (9) and a second ventilation duct opening (10), e. wherein the sash frame (2) and the window frame (1) are designed to close at least one of the ventilation duct openings (9, 10) in the closed position and to open both ventilation duct openings (9, 10) of the at least one ventilation duct (8) in the ventilation position, f. wherein at least two sealing layers are formed between the window frame (1) and the sash frame (2) in the region of the frame rebate space (F) in a closed state, g. wherein one of the sealing layers is formed by a center seal (18) between the window frame (1) and the sash frame (2), h. wherein the center seal (18) has a sealing base (20) and a sealing section (22) pivotally attached to the sealing base (20), characterized in that i. at least the at least one frame profile (1') of the window frame (1) in which the at least one ventilation duct (8) is formed is designed as a multi-chamber hollow profile which consists entirely or substantially of plastic, wherein the walls facing the adjacent spaces (I; II) of the window consist of plastic, and j. a sliding strip (24) is arranged on the sash frame (2) on one of its multiple frame profiles (2'), against which the center seal (18) rests in the ventilation position, wherein the sealing section (22), in the region or regions in which the respective ventilation duct (8) is formed, rests at its free end against the contact sliding section (23) on the sliding strip (24) and thus divides the frame rebate space in a sealing manner (F).

2. Window according to claim 1, characterized in that all of the multi-chamber profiles of the window frame (1) and / or the sash frame (2) are made entirely or substantially entirely of plastic.

3. Window according to claim 1 or 2, characterized in that the outer walls of the hollow chamber profiles made of plastic have a thickness of 2-4 mm, while partition walls which divide hollow chambers have a thickness of 1-2 mm.

4. Window according to one of the preceding claims, characterized in that one or more of the multi-chamber hollow profiles of the window frame (1) and / or the sash frame (2), which consist substantially of plastic, have at least one strengthening reinforcement or at least one strengthening insert (11, 12).

5. Window according to claim 4, characterized in that the respective strengthening reinforcement or the respective strengthening insert is designed as a metal profile.

6. Window according to claim 4 or 5, characterized in that the strengthening reinforcement is manufactured in coextrusion with the multi-chamber hollow profile (11, 12) made of plastic.

7. Window according to one of the preceding claims, characterized in that at least three sealing layers are formed between the window frame (1) and the sash frame (2) in the region of the frame rebate space when closed.

8. Window according to one of the preceding claims, characterized in that one or two of the sealing layers are formed by weather seals (8, 9) between the window frame (1) and the sash frame (2).

9. Window according to claim 8, characterized in that the center seal (18) is designed to form the sealing layer remaining in the frame rebate space (F) in the ventilation position and to divide the frame rebate space (F) into two frame rebate space sections (FI, FII) so that air can substantially only be exchanged in the ventilation position between the two frame rebate space sections (FI, II) through the ventilation duct (8).

10. Window according to claim 9, characterized in that the sealing section (22), at least in the region or regions in which a respective ventilation duct (8) is formed, rests at its free end against the contact sliding section (23) on the sash frame.

11. Window according to one of the preceding claims, characterized in that the one or more ventilation ducts (8) are each formed in a ventilation cassette (14) which is inserted into the window frame or the sash frame or in the respective window frame profile (1') or the respective sash frame profile (2'), and in that the respective ventilation cassette is inserted into a recess of the respective window frame profile (1') or the respective sash frame profile (2') facing the frame rebate space.

12. Window according to one of the preceding claims, characterized in that the frame profiles, with the exception of the strengthening reinforcements and / or the strengthening inserts, are made of a plastic material having a thermal conductivity of less than 1.0 W / mK.