EP0236557B1 - Ventilation device - Google Patents

Abstract

A ventilation device 1 for rooms has an elongate, parallelepipedal housing 2 with external air penetration openings 8 and inner air penetration openings 9, the inner air penetration openings 9 being situated in an inner extruded profile 4 and being capable of being opened or closed by a flap 14 which is removably suspended by a hook profile 14a and a hook profile 4h of the inner extruded profile 4 and is fixed against unintentional unhanging by a leg 5c of another housing profile 5, which serves as a securing web. <IMAGE>

Description

The invention relates to a ventilation device for rooms with an elongated, rectangular housing, which is composed of several longitudinal extrusion profiles and two end plates and in which each extrusion profile can optionally consist of light metal or plastic, with an outer, essentially upright extrusion profile optionally on one or several locations distributed over its length each has an air passage opening, while an opposing, also substantially upright, inner extrusion profile contains air passage openings arranged evenly distributed over its entire length, which can either be closed or closed by a further, adjustable extrusion profile assigned to it within the housing can be released, the outer extruded profile and the inner extruded profile through upper and lower, essentially horizontally arranged, extruded profiles are in a holding connection with each other and the adjustable extruded profile within the housing is designed as a flap suspended around one of its longitudinal edges.

Such ventilation devices are already known from DE-OS 28 02 696. They can either be installed directly in wall openings in the area of windows, doors or the like, or they can also be placed on the inside of a wall in the area of a channel-like wall opening.

It is possible to design these known ventilation devices as sound insulation ventilation devices, with which on the one hand a good air exchange between the interior of the room and the outside air can be achieved, but which at the same time can largely prevent the undesired penetration of outside noise into the interior of the room.

To achieve this goal, linings made of sound-absorbing material are inserted into the housing of the ventilation devices and enclose the air duct between the outer and the inner air passage openings. In addition, with such ventilation devices there is also the possibility of accommodating a blower within the elongated, cuboid-shaped housing, with the aid of which the air throughput can be supported by the air duct and sound insulation ducts. In this case, it is advisable to use an air guide chamber for receiving the fan in the cuboid housing of the ventilation device, as is provided for example by DE-PS 28 42 161.

The inner extruded profile of the cuboid housing is preferably designed as an air passage closure, as z. B. has become known from DE-PS 27 03 207. An end plate that can be moved parallel to its plane can be used as a shut-off device. However, an end plate which can be pivoted about an edge-side joint profile can also be used.

In the case of the air passage closures working with shut-off plates movable as a cross slide, the inner extruded profile of the housing and the shut-off plate must each be removed and installed in different, successive operations if, for example, the interior of the rectangular housing is to be exposed for repair and cleaning purposes. In the case of the air passage closures equipped with pivotable shut-off plates, on the other hand, the assembly and disassembly of the inner extruded profile and the shut-off plate is complex and complicated, because the joint bead of the shut-off plate can be pushed out and pushed in over its entire length relative to the joint groove of the inner extruded profile. If the ventilation device is longer, a relatively long working area is necessary for this work.

The invention aims at the creation of a ventilation device of the type mentioned at the outset, which makes it possible to easily assemble and disassemble all functional parts interacting in practical use with any possible interior.

The invention also aims at a structurally particularly simple design of this ventilation device.

On the one hand, a ventilation device of the type mentioned should be able to be adapted in a simple manner to a wide variety of installation requirements, in particular installation lengths. In addition, however, it is also sought that the air duct - possibly also subsequently - can be designed with the simplest means as a sound insulation duct, the parts of which can be easily replaced and cleaned if necessary.

It is also an object of the invention to provide a rotary drive and locking gear for the closure flap which, in the closed position of the same, can also be made locking at both ends thereof, thereby optimizing the tight closure of the ventilation device in the area of the air passage openings on the room side.

Finally, it is also the task of creating a ventilation device of the type specified, which can be equipped with a blower and in which then undesirable signs of wear on the switching and / or regulating element of the speed controller for the electric motor of the fan can be avoided.

Basically, this aim is achieved according to the invention in that a hook profile formed along this longitudinal edge forms the suspension of the flap, which engages over a hook profile on the inner extruded profile which is oriented opposite to it, and in that case the hook profile of the flap itself is supported and fixed by a web profile is, which is located on the upper extruded profile of the housing carrying or holding the inner extruded profile.

The particular advantage of this embodiment is that, on the one hand, the inner extruded profile, which is provided with air passage openings arranged in the manner of a lattice hole, along its entire length, can be manually coupled and uncoupled with the extruded profile forming the flap by means of a simple hook-in connection, and - that this hook-in connection with the inner attached to the housing Extruded profile is automatically and inevitably secured.

The light but reliable holding connection of the inner extruded profile at its two longitudinal edges can be brought about in an advantageous manner by means of C- or U-shaped locking claws which can also be releasably locked and / or closed in C-or U-shaped locking claws of the two extruded profiles carrying it jammed.

There is another development feature of the invention is that the extruded profile forming the flap is a hollow profile which has at least on its inner longitudinal side retaining webs for a strip or block made of sound-absorbing material. In this way, the sound-absorbing material is kept detachably connected to the flap for cleaning purposes.

For an optimal effect of the air passage closure, it proves to be particularly important according to the invention that the extruded profile forming the flap on its longitudinal edge facing away from the hook profile contains a dovetail or C-shaped undercut guide profile, into which a locking rail or the like can be inserted longitudinally, which are assigned abutments at both ends in the end plates of the housing, which form locking elements or interventions. In this way, the flap is pressed evenly over its entire length against the inside of the inner extruded profile in the closed position.

A design of the ventilation device which favors the air flow through the housing results according to the invention in that the outer extruded profile has a longitudinally extending, outwardly projecting and approximately trapezoidal profiled hollow rib, in the downward-pointing profile wall of which the air passage openings are incorporated, preferably this profile wall downwards is dominated by the drip nose.

With a favorable ventilation effect, it proves to be important for achieving a good sound insulation effect according to the invention that a C-shaped or G-shaped profile made of sound-absorbing material is used in the housing, which on the one hand has at least one in its wall adjacent to the hollow rib of the outer extruded profile the hollow rib has an opening, while its slot-like longitudinal opening on the opposite wall is at least approximately at the level of the suspension of the rattles on the inner extruded profile. When the air passage closure is open, the interaction of the flap with the profile made of sound-absorbing material forces the air flow to be deflected several times, thereby producing a high sound-insulating effect.

If, according to the invention, the outer extruded profile is positively connected at its longitudinal edges with the interposition of coupling profile bars with the upper and the lower, horizontally arranged extruded profile, then all extruded profiles can consist of a thin-walled light metal, while the coupling profile bars are made of heat-insulating plastic. These measures create a lightweight but stable and yet heat-insulating housing for a ventilation device.

A good cohesion of the housing is also ensured in that the coupling members made of complementary, undercut profiled webs and grooves, for example those with a circular arc-limited cross section, are provided on the coupling profile bars and the extruded profiles associated therewith.

Another further development embodiment of the invention is that the upper and lower extruded profiles each have two longitudinal webs or ribs projecting towards their inner side, each spaced from the main plane of the outer and inner extruded profiles, and between them in the housing an air guide chamber formed from two molded parts symmetrical to a horizontal longitudinal center plane can be used, which delimits a tubular air passage towards the outer extruded profile, while still containing air passage openings directed therefrom on opposite sides.

This configuration makes it possible to first insert the two molded parts for the air guide chamber into the housing independently of one another from the longitudinal side open when the inner extruded profile has been removed, and then to insert them in a mirror-inverted position to bring them into alignment or axial alignment within the housing by longitudinal displacement. The air guiding chamber can also be displaced in the longitudinal direction as a whole within the housing and can be fixed in any desired relative position, for example simply - by laterally inserting the sound-absorbing material profiles.

Finally, it is also advantageous if the longitudinal wall of the air guide chamber opposite the air passage forms a releasable connecting part for the two molded parts and the support for a blower, in particular an axial fan, which can be inserted into the air guide chamber.

A particularly simple embodiment is also achieved in that the cross-sectionally C-shaped profile made of sound-absorbing material is formed by a flat strip of material which is inserted transversely into the housing with a double kink in the longitudinal direction and is held therein under internal stress, and in that case only that the air guide chamber adjoining ends of the C-profiles are covered on their opening side by relatively short laminated tongues.

Practical tests have shown that in such a structurally simple ventilation device, the desired high sound absorption effect can be achieved if the length of the laminate tongues corresponds approximately to the clear cross-sectional height of the C-profile, i.e. over most of its length towards the room side optional closing or opening of the air passage serving extrusion profile is provided completely open.

The removal and installation of the material strip forming the C-shaped profile made of sound-absorbing material, which is necessary for cleaning and / or maintenance work, is made particularly simple in this way and is not hindered by the laminate tongues.

In a further embodiment of the ventilation device, the invention proposes that the cross-sectionally C-shaped profile made of sound-absorbing material is preceded on the outside by a multilayer wall, the cover layers of which are each made of relatively thin, sound-hard material, e.g. Hard plastic or sheet metal exist, while the intermediate layer is formed from relatively thick sound absorption material. This multilayer wall can also be removably installed in the cuboid housing in such a way that it is effective as a support system for the web of the cross-sectionally C-shaped profile made of sound-absorbing material. The sound insulation effect of the ventilation device is improved in a special way by this measure.

An essential feature of the invention is further seen in the fact that the outer wall of the housing consists of three extruded profiles which can be connected or connected to one another by snap-in and / or clamping couplings, of which the middle one is interrupted one or more times to form the air passage openings.

When assembling the housing, the air passage openings can be easily determined in terms of their number and length simply by correspondingly different length dimensioning of the sections of the central extruded profile. The length adjustment only requires simple separating cuts on the individual extruded profiles when building the housing.

According to the invention, it has proven to be advantageous if the upper and lower extruded profiles of the outer wall each consist of light metal, while the central extruded profile is made of plastic.

Another design feature essential to the invention also consists in the fact that a sound-absorbing duct which is trapezoidal in cross-section is formed in the housing, on the one hand by the central extruded profile and on the other hand by three mutually inclined insulation strips, e.g. is made of foam plastic or foam rubber.

The insulation strip of the soundproofing duct, which is aligned parallel to the central extruded profile, can be coated on the outside with a plate made of weight material, e.g. Sheet metal, be occupied. The insulation strip aligned parallel to the central extruded profile of the outer wall is preferably inserted into the housing in such a way that its plate made of weight material is still at a relatively large distance from the inner wall of the housing and, in the space available here, the end plate serving as a shut-off device between its closed position and its release position can be arranged adjustable.

There is a further design feature of the invention in that the insulating material strip aligned parallel to the central extrusion profile is perforated or divided in the longitudinal direction, the opening or interruption areas being offset laterally - with a gap - with respect to the air passage openings kept free from the central extrusion profile of the outer wall.

Finally, according to the invention, the insulation strips of the sound insulation duct between the longitudinal webs and / or strips on the inside of the housing can be held releasably with clamping tension, the insulation strips covered with weight material preferably being additionally secured in position by sprung-in spring clips.

It is also advantageous to use a swivel drive and locking gear for the flap behind the end plate, which is arranged on the room side and is provided with air passage openings, in particular with grille perforations, of the cuboid housing, for example. The flap, which is pivotably mounted about one of its longitudinal edges, is in operative engagement with a control lever which is pivoted parallel to it and the control lever is pivotably mounted about an axis which is offset relative to the swivel bearing of the flap, both in the vertical and in the vertical direction, and one is curved in the pivot plane has curved stroke curve, which has a varying distance relative to the bearing axis over at least part of its length and engages on a projection at the end of the flap.

Such a rotary drive and locking gear is normally structurally designed so that it is supported at one end of the cuboid housing and only there between this housing and the flap is effective both for opening and closing and for locking the same.

So that a swivel drive and locking gear of this design has a locking effect at least at both ends of the flap in the closed position of the flap and thereby optimizes the tight closure of the ventilation device in the area of the air passage openings on the room side, it is therefore of particular advantage that the actuating device has another, transverse to it Swing plane directed stroke curve with which a push rod serving as a locking bar is in engagement, which is slidably guided on the flap at a distance parallel to its pivot bearing and has at least one locking piece that can be brought into and out of a retaining connection with a locking engagement on the housing side.

The swivel drive and locking gear according to the invention is particularly advantageous in so far as it can be easily adapted to any possible length of the ventilation devices, simply by cutting the push rod to a length that corresponds to the distance between the adjusting lever and one end of the housing the latch engagement provided at the other end of the housing is adapted. At one end of the ventilation device, the locking of the flap located in the closed position is effected via the projection thereof which is in engagement with the first lifting curve, while at the opposite end of the ventilation device the push rod end immediately comes into a holding connection with the locking engagement on the housing side.

In a further embodiment of the swivel drive and locking gear according to the invention, it is proposed that the one stroke curve is a curved slot or a curved nose in the side surface of the actuating lever, into which the projection of the flap protrudes sideways, while the second stroke curve is in one in the same Lateral surface formed trough, the first stroke curve of the actuating lever produces an inevitable pivoting movement of the flap between its closed position and the open position, while the second stroke curve can at least non-positively move the push rod.

It is also proposed according to the invention that the trough or the second stroke curve is offset in the radial and circumferential directions from the first stroke curve in the side face of the actuating lever, so that the projection of the flap interacting with the first stroke curve and the push rod guided thereon can be pushed radially can have a different distance from the pivot bearing of the flap.

So that a swivel drive and locking gear according to the invention in one and the same version is suitable for optional installation on the right or left end of the ventilation device, the actuating lever is designed symmetrically to a plane intersecting its swivel axis at right angles, that is to say provided on both side surfaces with two lifting curves . If the actuating lever is mounted on the inside of an end plate of a housing, it can be in contact with one end of the push rod guided in the flap via the second lifting curve located in its side surfaces facing away from the end plate, while at least the other end of this push rod on the opposite end plate of the housing is assigned a bevel as bolt engagement and abutment. Between the second stroke curve of the actuating lever and the bevel of the locking engagement or abutment, the push rod is only moved in a positive manner between its locking position and its unlocking position in this embodiment, and it gets into the unlocking position depending on the opening-pivoting movement of the flap by the locking engagement or abutment associated end slides on the tightening slope.

Furthermore, it has proven to be advantageous according to the invention if the tightening bevel with the bolt engagement or abutment is provided parallel to the level of the end plate, preferably continuously, in an adjustable or adjustable manner, because in this way the closing pressure for the flap can be matched to the existing requirements at any time. For this purpose, the positioning or. Adjusting member for the bolt engagement or the abutment formed by a screw spindle, which rotatably but axially immovable in the end plate, and on it rem exposed end is provided with a tool engagement. The screw spindle can be actuated, for example, by a screwdriver.

It has also proven to be expedient according to the invention if the push rod consists of a wear-resistant plastic profile which is received in an undercut longitudinal groove on the flap which serves as a guide profile. In the simplest case, the plastic profile can have a flat, rectangular cross section and only act directly as a locking piece with its end facing away from the adjusting lever. However, it could also have an approximately T-shaped cross-section, the T-web protruding from the longitudinal groove and having toothing which is uniformly distributed over its entire length and which can come into and out of operative connection with associated counter-toothing within the housing.

The locking engagement or the abutment, which interacts with the free end of the push rod, can be located in an insert which is held in a cutout of the end plate, but is fixed in a form-fitting manner.

If the insert is then essentially symmetrically shaped to a central plane parallel to the end plate and the cutout for receiving the actuating lever corresponds structurally to the cutout for receiving the insert in the end plates, the insert can also be used for optional right and left installation will.

Finally, the invention is also characterized in that the actuating lever carries a toothed segment at a point diametrically opposite the actuating cam protruding from the end plate, with which a drive pinion of an actuating motor can be brought into engagement, while in the area between the toothed segment and the actuating cam on the actuating lever another driver can sit, with which an electrical switching and / or regulating element for the shift motor of a blower can be brought into engagement.

In this way, a swivel drive and locking gear according to the invention can be used in many ways, i.e. it can be used practically in one and the same version for ventilation devices which have a wide variety of equipment. The actuating lever can not only be operated directly via its actuating cam or manually by interposing a linkage, but it can also be moved by an electric actuator. The control lever itself can also be used to switch an electrical blower installed in the ventilation device on and off or to regulate its working speed.

According to the invention, a ventilation device can also be equipped with a fan that can be influenced by a speed controller and operated by an electric motor.

So that there is no need to use rotary or slide potentiometers with sliding contact to regulate the speed of the electric motor, which are naturally subject to considerable wear and tear and therefore impair their effectiveness after a relatively short period of use if the locking devices of the ventilation device are subject to a relatively high operating frequency, i.e. very much Often have to be opened and closed, the invention provides that the speed controller has two coils inductively coupled to one another exclusively by a common, axially displaceable core, of which the primary coil is connected through a capacitor and possibly a resistor connected in parallel as a spark extinguisher a switch contact can be connected to the network, while the secondary coil with a diode, a capacitor, at least one resistor and a transistor and a bridge rectifier the speed control circuit for the electrom otor of the fan forms.

The invention provides that the axially displaceable core continuously penetrates the entire length of the secondary coil, while it can be shifted relative to the primary coil in its operative position between a maximum dimension and a minimum dimension.

Functionally, it has also proven to be useful if the diameter of the core is approximately 15% smaller than the inside diameter of the coils, which e.g. at a length of 18 mm, have a resistance of 1200 ohms.

It is also considered particularly expedient if the core of the two coils consists of a welding wire alloy, while a MOS-FET transistor is proposed for use as a transistor.

• Fig. 1 in räumlicher Ansichtsdarstellung von vorne den Gesamtaufbau einer Lüftungsvorrichtung für Räume,
• Fig. 2 in größerem Maßstab einen Querschnitt entlang der Linie 11 - II durch die Lüftungsvorrichtung nach Fig. 1,
• Fig. 3 in größerem Maßstab einen Schnitt entlang der Linie 111 - 111 durch die Lüftungsvorrichtung nach Fig. 1, sowie die
• Fig. 4 und 4' einen Horizontalschnitt entlang der Linie IV - IV'durch die Lüftungsvorrichtung nach Fig. 1,
• Fig. 5 eine Ausschnittvergrößerung des inneren Teilbereichs der Lüftungsvorrichtung nach den Fig. 2 und 3 bei in Schließlage befindlicher Abschlußklappe,
• Fig. 6 in räumlicher Ansichtsdarstellung von vorne den Gesamtaufbau einer weiteren Lüftungsvorrichtung für Räume,
• Fig. 7 in größerem Maßstab einen Querschnitt entlang der Linie VII - VII in Fig. 6,
• Fig. 8 ebenfalls in größerem Maßstab einen teilweisen Längsschnitt entlang der Linie VIII - VIII durch die Lüftungsvorrichtung nach Fig. 6,
• Fig. 9 in räumlicher Ansichtsdarstellung von vorne den Gesamtaufbau einer wieder anderen Lüftungsvorrichtung für Räume,
• Fig. 10 in größerem Maßstab einen Querschnitt entlang der Linie X - X durch die Lüftungsvorrichtung nach Fig. 9,
• Fig. 11 in schematisch vereinfachter Darstellung die Lüftungsvorrichtung in Pfeilrichtung XI der Fig. 9 gesehen,
• Fig. 12 in räumlicher Ansichtsdarstellung von vorne den Gesamtaufbau einer noch anderen Lüftungsvorrichtung für Räume,
• Fig. 13 in größerem Maßstab einen Querschnitt entlang der Linie XIII - XIII durch die Lüftungsvorrichtung nach Fig. 12,
• Fig. 14 ebenfalls in größerem Maßstab einen Schnitt entlang der Linie XIV - XIV durch die Lüftungsvorrichtung nach Fig. 12 bei in Öffnungsstellung befindlicher Verschlußklappe der Lüftungsvorrichtung,
• Fig. 15 einen der Fig. 14 entsprechenden Schnitt, jedoch bei Schließlage der Verschlußklappe,
• Fig. 16 einen Schnitt entlang der Linie XVI - XVI in Fig. 15,
• Fig. 17 einen Schnitt entlang der Linie XVII - XVII in Fig. 12,
• Fig. 18 einen Schnitt entlang der Linie XVIII - XVIII in den Fig. 12 und 13, und zwar jeweils nur im Bereich der beiden Endplatten des Gehäuses der Lüftungsvorrichtung bei Schließlage der Verschlußklappe,
• Fig. 19 in räumlicher Ansichtsdarstellung von vorne den Gesamtaufbau einer letzten Ausführungsform der Lüftungsvorrichtung für Räume,
• Fig. 20 in größerem Maßstab einen Querschnitt entlang der Linie XX - XX durch die Lüftungsvorrichtung nach Fig. 19,
• Fig. 21 ebenfalls in größerem Maßstab einen Schnitt entlang der Linie XXI - XXI durch die Lüftungsvorrichtung nach Fig. 19 bei in Öffnungsstellung befindlicher Verschlußklappe der Lüftungsvorrichtung,
• Fig. 22 einen der Fig. 21 entsprechenden Schnitt, jedoch bei Schließlage der Verschlußklappe,
• Fig. 23 einen Schnitt entlang der Linie XXII - XXII in Fig. 22,
• Fig. 24 einen Schnitt entlang der Linie XXIV - XXIV in Fig. 19,
• Fig. 25 einen Schnitt entlang der Linie XXV - XXV in den Fig. 19 und 20, und zwar jeweils nur im Bereich der beiden Endplatten des Gehäuses der Lüftungsvorrichtung bei Schließlage der Verschlußklappe und
• Fig. 26 einen Drehzahlregler für ein in das Gehäuse der Lüftungsvorrichtung eingebautes Gebläse.

Further features and advantages of the subject matter of the invention are explained below with reference to drawings. It shows

• 1 is a spatial front view of the overall structure of a ventilation device for rooms,
• 2 on a larger scale a cross section along the line 11 - II through the ventilation device according to FIG. 1,
• Fig. 3 on a larger scale a section along the line 111 - 111 through the ventilation device of FIG. 1, and the
• 4 and 4 'a horizontal section along the line IV - IV 'through the ventilation device according to FIG. 1,
• 5 is an enlarged detail of the inner portion of the ventilation device according to FIGS. 2 and 3 with the end flap in the closed position,
• 6 is a spatial view from the front of the overall structure of another ventilation device for rooms,
• 7 on a larger scale a cross section along the line VII - VII in FIG. 6,
• 8 also on a larger scale, a partial longitudinal section along the line VIII - VIII through the ventilation device according to FIG. 6,
• 9 is a spatial front view of the overall structure of yet another ventilation device for rooms,
• 10 on a larger scale a cross section along the line X - X through the ventilation device according to FIG. 9,
• 11 seen in a schematically simplified representation the ventilation device in the direction of arrow XI of FIG. 9,
• 12 is a spatial view from the front of the overall structure of yet another ventilation device for rooms,
• 13 shows, on a larger scale, a cross section along the line XIII-XIII through the ventilation device according to FIG. 12,
• 14 also shows a section on a larger scale along the line XIV-XIV through the ventilation device according to FIG. 12 with the flap of the ventilation device in the open position,
• 15 shows a section corresponding to FIG. 14, but with the closure flap in the closed position,
• 16 shows a section along the line XVI - XVI in FIG. 15,
• 17 shows a section along the line XVII - XVII in FIG. 12,
• 18 shows a section along the line XVIII - XVIII in FIGS. 12 and 13, in each case only in the region of the two end plates of the housing of the ventilation device when the closure flap is in the closed position,
• 19 in a spatial view from the front, the overall structure of a last embodiment of the ventilation device for rooms,
• 20 on a larger scale a cross section along the line XX - XX through the ventilation device according to FIG. 19,
• 21 also shows a section on a larger scale along the line XXI - XXI through the ventilation device according to FIG. 19 with the closure flap of the ventilation device in the open position,
• 22 shows a section corresponding to FIG. 21, but with the closure flap in the closed position,
• 23 shows a section along the line XXII - XXII in FIG. 22,
• 24 shows a section along the line XXIV-XXIV in FIG. 19,
• 25 shows a section along the line XXV - XXV in FIGS. 19 and 20, in each case only in the region of the two end plates of the housing of the ventilation device when the closure flap and
• Fig. 26 shows a speed controller for a fan built into the housing of the ventilation device.

In Fig. 1 of the drawing, the overall view of a ventilation device 1 for rooms is shown, which is preferably suitable for installation in fixed frames or sashes of windows and doors, but which can also be used in slot-like wall openings if necessary.

This ventilation device 1 has an elongated, rectangular housing 2, which is composed of a plurality of longitudinally extruded profiles 3, 4, 5 and 6 and two end plates 7a and 7b.

The extruded profiles 3, 4, 5 and 6 are preferably made of thin-walled light metal, while the two end plates 7a and 7b are made as injection molded parts made of plastic.

The shape of the extruded profiles 3, 4, 5 and 6 can be seen in detail from FIGS. 2 and 3. The result is that the outer extruded profile 3 of the housing 2 is arranged substantially upright and has a longitudinally extending, outwardly projecting and approximately trapezoidal profiled hollow rib 3a, which has a has an upper, inclined profile wall 3b, a vertical profile wall 3c and a lower, inclined profile wall 3b, which is drilled downward in the same plane with the profile wall 3c by a drip nose 3e.

Air passage openings 8, which preferably have an elongated slot shape, can be punched out of the lower, inclined profile wall 3d distributed over the length of the hollow rib 3a, as can be clearly seen in FIGS. 4 and 4 '.

The inner extruded profile 4 of the housing 3, which is opposite the outer extruded profile 3, is also arranged essentially upright and has air passage openings 9 which are distributed uniformly over its entire length and which are arranged, for example, in three rows one above the other and form a grille perforation, as clearly shown in FIG 1 can be seen. The connection between the outer extruded profile 3 and the inner extruded profile 4 is formed by the essentially horizontally arranged, two extruded profiles 5 and 6, which have the same profile cross section, but are arranged symmetrically to each other to a horizontal plane. On the outwardly directed longitudinal edge, the two extruded profiles 5 and 6 each have a longitudinal, bead-shaped thickening 5a or 6a, with which a plastic profile rod 10 or 11 manufactured by extrusion can be brought into a form-fitting holding engagement via a complementary longitudinal groove 10a or 11a. Each of the plastic profile bars 10 and 11 has on its longitudinal side opposite the undercut profile groove 10a or 11 an undercut profile bead 10b or 11b, which in turn is brought with a complementary longitudinal groove 3f and 3g on both longitudinal edges of the outer extruded profile 3 in a positive locking connection can. The plastic profile rods 10 and 11 produce a thermally insulating retaining connection between the outer extruded profile 3 and the upper extruded profile 5 and the lower extruded profile 6 of the housing 2 in this way. The inner longitudinal edge of the extruded profiles 5 and 6 is provided with an approximately Z-shaped bend 5b or 6b, the free leg 5c or 6c of which cooperates with the inner extruded profile 4 as an alignment and holding element. For this purpose, the inner extruded profile 4 has a development 4a and 4b on each of its two longitudinal edges, which engages around the free leg 5c or 6c on the outside.

The formation of the free legs 5c and 6c of the two extruded profiles 5 and 6 and the bends 4a and 4b of the inner extruded profile 5 can be seen particularly clearly from FIG. 5 of the drawing. It can be seen here that the bends 4a and 4b in cross section form approximately C- or U-shaped locking claws 4c, each having an outer leg 4d and an inner leg 4e. A round cord seal 10 is inserted between these legs 4d and 4e in an undercut groove 4f.

The inner leg 4e of each latching claw 4c is provided with a longitudinal bead 4g which is latched behind by a likewise longitudinal bead 5d or 6d of the free leg 5c or 6c of the extruded profiles 5 or 6.

At a distance parallel to the free leg 5c or 6c of the extruded profiles 5 and 6, a claw-like profile 5e or -6e runs against the leg 5c or 6c, which overlaps the leg 4e of the inner extruded profile 4 and is held in sealing contact with the round cord seal 10 becomes. The profiles 5e and 6e are in turn encompassed by the longitudinal web 4d of the locking claws 4c of the inner extruded profile 4, so that they form the outer longitudinal termination of the inner extruded profile 4 with respect to both extruded profiles 5 and 6.

On the back of the inner extruded profile 4, a hook profile 4h is integrally formed above the air passage openings or lattice perforations 9, which has an upward, free hook leg 4i, which ends at a predetermined distance below the free leg 5c of the upper extruded profile 5.

Below this hook profile 4i and also below the air passage openings or grille perforation 9, an undercut longitudinal groove 4k is in turn formed in the back of the inner extruded profile 4, each of which forms a holder for a rubber or plastic lip seal 13.

The back of the inner extruded profile 4 is also pivotally associated with a flap 14 formed by an extruded profile, namely a hollow profile, its suspension consisting of a hook profile 14a integrally formed along its upper longitudinal edge, which has the upward leg 4i of the hook profile 4h on the inside Extruded profile 4 engages from above.

The hook profile 14a of the rattle 14 is simply hooked from above into the free leg 4i of the hook profile 4h on the inner extruded profile 4, its approximately triangular profiled inner surface 14b being pivotally supported on the circular end surface of the hook leg 4i.

Above the hook profile 14a of the flap 14 is overlapped by the free leg 5c of the extruded profile 5 with little play, the leg 5c forming a securing web which one Unhooking the hook profile 14a counteracts as long as the inner extruded profile 4 is held together by the snap connections with the extruded profiles 5 and 6. When the inner extruded profile 4 is released, the flap 14 with its hook profile 14a can easily be brought into and out of holding engagement with the hook profile 4h of the inner extruded profile 4.

From Fig. 5 of the drawing it can be seen that the flap 14 formed from a hollow extruded profile, in its vertically depending position, blocks the air passage openings or grille perforations 9 of the inner extruded profile 4, the lip seals 13 each having a sealing fold 14c on the flap 14 in sealing engagement come. 5 the flap 14 can be pivoted about its hook profile 14a relative to the inner extruded profile 4a into the open position according to FIGS. 2 and 3, so that the air passage openings or grille perforations 9 are released towards the inside of the housing 2.

The extruded hollow profile forming the flap 14 has on its inner longitudinal side two hook-shaped holding webs 14d facing one another for a strip or block of sound-absorbing material 15 in such a way that it is easily detachably connected to the flap 14 for cleaning purposes. On the long side opposite the hook profile 14a, the flap 14 is also provided with a dovetail or C-shaped undercut profiled longitudinal groove 14e, in which a locking rail 16 can be moved, with the aid of which the flap 14 can be seen in FIG. 5 Locked position, preferably on the two end plates 7a and 7b of the housing 2 and can be fixed in abutments formed there.

The Fig. 2 can be seen that there is the possibility, in the housing 2 of the ventilation device 1, an approximately C- or G-shaped profile 17 made of sound absorbing material, for. B. use foam rubber or foam plastic. On the one hand, this can have at least one opening 17b in its wall 17a adjacent to the hollow rib 3a of the outer extruded profile 3, while its slot-like longitudinal opening 17c in the opposite longitudinal wall 17d extends uninterruptedly over the entire length and - in the exemplary embodiment shown - approximately at the level of the suspension 14a, 4h of the flap 14 on the inner extruded profile 4.

In this way, an air-guiding and sound-absorbing channel 18a, 18b, 18c, 18d, which is wound several times in its cross-sectional direction, is formed within the housing 2, which leads to the interior of the room both when the flap 14 is closed and when it is open, by means of the strip or block attached to it is limited from sound absorption material 15. Of course, it would also be possible to design the profile made of sound-absorbing material 17 only approximately C-shaped or U-shaped, the flap 14 with the strip or block of sound-absorbing material 15 then being assigned to the open cross-sectional side of this sound-absorbing profile.

3 and 4 of the drawing it can be seen that an air guide chamber 19 can also be inserted into the housing 2 of the ventilation device 1. For this purpose, the upper extruded profile 5 and the lower extruded profile 6 are each provided with two longitudinal webs 5f, 6f and 5g, 6g projecting towards their inside, each of which has a distance from the main plane of the inner extruded profile 4 and the outer extruded profile 3. The air guide chamber 19 can be inserted between these longitudinal webs 5f, 6f and 5g, 6g, as can be clearly seen in FIG. 3. This air guide chamber 19 is formed by two molded parts 19b and 19c which are symmetrical about a horizontal longitudinal center plane 19a-19a and by a connecting part 20 assigned to them.

The two molded parts 19b and 19c of the air guiding chamber 19 delimit a tubular air passage 19d towards the outer extruded profile 3, while they further determine passage openings 19e and 19f directed therefrom from opposite sides, as can be seen in FIGS. 3 and 4.

The two molded parts 19b and 19c can each be individually inserted into the housing 2 of the ventilation device with the inner extruded profile 4 removed and inserted between the longitudinal webs 5f, 5g and 6f, 6g in a mirror-inverted position. By mutually longitudinally displacing the two molded parts 19b and 19c, they then come into coincidence with one another, as can be seen in FIGS. 3 and 4. Then they can then be fixed relative to one another by inserting and fastening the releasable connecting part 20 forming the rear wall of the air guide chamber. The position fixing of the air guide chamber 19 in the longitudinal direction of the housing 2 can be effected by means of the molded parts made of sound-absorbing material 17, which can then be inserted into the housing 2 of the ventilation device 1 on both sides of the air guide chamber 19.

The tubular air passage 19d is in constant communication with the air passage openings 8 in the outwardly projecting, approximately trapezoidal profiled hollow rib 3a of the outer extruded profile 3, and possibly also over those length regions of the hollow rib 3a which are shielded inwards by the sound absorbing material 17 2, 4 and 4 '. The side-facing Passage openings 19e and 19f of the air duct chamber 19, on the other hand, are only connected to the air duct and sound absorption channels 18a, 18b, 18c, 18d within the sound absorption material 17. For this purpose, the sideways sections of the air guide chamber 19 are provided with slot-shaped incisions 19g and 19h over their entire height, that is to say on both molded parts 19b and 19c, as can be seen in FIG. 4. The slot-shaped incisions 19g are located on the side of the air guide chamber 19 facing the inner extruded profile 4, while the slot-shaped incisions 19h are assigned to the area of the housing 2 adjacent to the outer extruded profile 3.

While in each case only one slot-shaped incision 19g is formed on each side of the air guide chamber 19, the slot-shaped incisions 19h are each provided several at a distance in the direction of the depth of the air guide chamber 19. In the slot-shaped incisions 19g can extend over the entire height of the housing 2 of the ventilation device 1 air baffle 21 with one end 21, while the other end 21 b is brought into engagement with the profiles made of sound-absorbing material 17. A similar air baffle 22 can be brought into engagement in any slot-like incision 19h with its one end 22a, while its other end 22b likewise engages with the profile made of sound-absorbing material 17. The air is guided through the free space 23 between the two guide walls 21 and 22, the cross section of this free space 23 following the air guide chamber 19 being able to be varied to the extent that the various slot-like incisions 19h allow.

If necessary, a blower 24 can also be installed in the air guide chamber 19, which is preferably designed as an axial fan. The impeller or the propeller 24a of this axial fan 24 is received within the tubular air passage 19d, as can be seen from the dash-dotted lines in FIGS. 3 and 4. The stator or drive motor 24b of this axial fan 24, on the other hand, projects rearward into the air guide chamber 19 and is fastened there on the wall forming the connecting part 20 between the two molded parts 19b and 19c.

It is obvious that the guide walls 21 and 22 between the air guide chamber 19 and the molded parts made of sound-absorbing material 17 can also be made significantly shorter, as shown in FIG. 4. Namely, it is possible to design it so that the profiles made of sound-absorbing material 17 practically directly adjoin the air-guiding chamber 19 so that the guide walls 21 and 22 merely overlap their ends somewhat.

The construction of a ventilation device 1 described above makes it possible to build installation cross sections with a cross-sectional side length of the housing 2 of 80 to 100 millimeters, but nevertheless achieve good air throughput and good sound insulation.

6 of the drawing shows the overall view of a ventilation device 31 for rooms, which is preferably suitable for installation in fixed frames or sashes of windows, doors or the like, but which may also be used in slot-like wall openings or placed in front of wall openings can be. This ventilation device 31 has an elongated, rectangular housing 32 which is composed of a plurality of longitudinally extruded profiles 33, 34, 35 and 36 and two end plates 37a and 37b.

As can be seen particularly clearly in FIG. 7, the extruded profiles 33, 34, 35 and 36 can preferably be made of thin-walled light metal, while the two end plates 37a and 37b are made of plastic as injection molded parts. However, all of these components can also consist of the same material, for example light metal or plastic.

The shape of the extruded profiles 33, 34, 35 and 36 can be easily seen in FIG. 7 of the drawing. The outer extruded profile 33 of the housing 32 is provided with air passage openings 38 which are distributed over its length, as can easily be seen in FIG. 2. The inner extruded profile 34 of the housing 32 opposite the outer extruded profile 33 is arranged essentially upright and has air passage openings 39 which are distributed uniformly over its entire length and which are arranged, for example, in three rows one above the other and form a grille perforation, as clearly shown in FIG. 6 can be seen. The connection between the outer extruded profile 33 and the inner extruded profile 34 is formed by the essentially horizontally arranged, two extruded profiles 35 and 36, which have a matching profile cross-section, but are arranged symmetrically to one another with respect to a horizontal plane.

On the outwardly directed longitudinal edge, the two extruded profiles 35 and 36 each have a longitudinal, bead-shaped thickening 35a, 36a, with which a plastic profile rod 40 or 41 made by extrusion has a complete mental longitudinal groove 40a or 41 a can be brought into positive locking engagement. Each of the plastic profile bars 40 and 41 has on its longitudinal side opposite the undercut profile groove 40a or 41a an undercut profile bead 40b or 41b, which in turn is brought into a positive locking connection with a complementary longitudinal groove 33a or 33b on both longitudinal edges of the outer extruded profile 33 can. The plastic profile bars 40 and 41 produce a heat-insulating holding connection between the outer extruded profile 33 and the upper extruded profile 35 and the lower extruded profile 36 of the housing 32 in this way.

The inner longitudinal edge of the extruded profile 35 and 36 is provided with an approximately Z-shaped bend 35b or 36b, the free leg 35c or 36c of which interacts with the inner extruded profile 34 as an alignment and holding element. For this purpose, the inner extruded profile 34 has an angled portion 34a and 34b on each of its two longitudinal edges, which surrounds the free leg 35c and 36c on the outside.

On the back of the inner extruded profile 34, a hook profile 34c is integrally formed above the air passage openings or lattice perforations 39, which has an upward, free hook leg 34d, which ends at a predetermined distance below the free leg 35c of the upper extruded profile 35.

The rear of the inner extruded profile 34 is also pivotally associated with a flap 44 formed by an extruded profile, namely a hollow profile, its suspension consisting of a hook profile 44a integrally molded along its upper longitudinal edge, which on the inner side has the upwardly directed leg 34d of the hook profile 34c Extruded profile 34 engages from above.

The hook profile 44a of the flap 44 is simply hooked from above into the free leg 34d of the hook profile 34c on the inner extruded profile 34, its inner surface being pivotally supported on the circular end surface of the hook leg 34d.

Above the hook profile 44a of the flap 44 is overlapped by the free leg 35c of the extruded profile 35 with little play, the leg 35c forming a securing web which counteracts the hook profile 44a from being detached as long as the inner extruded profile 34 by the snap-in connections with the extruded profiles 35 and 36 is held together. When the inner extruded profile 34 is released, however, the flap 44 with its hook profile 44a can easily be brought into and out of holding engagement with the hook profile 34c of the inner extruded profile 34.

The extruded hollow profile forming the flap 44 has on its inner longitudinal side two hook-shaped retaining webs 44b and 44c for a strip or block 45 made of sound-absorbing material, such that it is easily detachably connected to the flap 44 for cleaning purposes.

From Fig. 7 it can also be seen that in the housing 32 of the ventilation device 31 approximately C-shaped profiles 47 made of sound-absorbing material, e.g. Foam rubber or foam plastic, sit. These profiles 47 are formed in the simplest manner from a flat strip of material, which is inserted transversely into the housing 32 when the inner extruded profile 34 has been removed and thereby receives a double kink 47a, 47b in the longitudinal direction, so that a profile web 47c with two on it subsequent profile legs 47d and 47e is formed. The C-shaped profile 47 formed in this way is held exclusively under internal stress within the housing 32, the free end edges 47f and 47g of the legs 47d and 47e being securely supported against the inner surfaces of the vertical webs on the Z-shaped bends 35b and 36b.

The cross-sectionally C-shaped profiles 47 made of sound-absorbing material each enclose a sound-absorbing duct 48 on three sides within the housing 32, two such sound-absorbing ducts 48 originating from an air guiding chamber 49, which is accommodated within the housing 32, as can be seen in FIG. 8.

The air guide chamber 49 has a tubular air passage 49a towards the outer extruded profile 33, while it also has passage openings 49b and 49c directed from this to opposite sides, to which the sound absorption channels 48 then connect.

From the air guide chamber 49, following the passage openings 49b and 49c, relatively short laminate tongues 50a and 50b between the legs 47d and 47e of the C-shaped profiles 47 protrude into the sound absorption channels 48 and cover their opening side over corresponding length sections in the direction of the flap 44 from.

The laminate tongues 50a and 50b are advantageously part of a plate 50 made of soundproof material, which can be detachably connected to the housing of the air guide chamber 49. The length of the laminate tongues 50a and 50b is in each case dimensioned such that it corresponds approximately to the clear cross-sectional height of the C-profile 47 between its two legs 47d and 47e. It has been shown that such a relatively small length dimension of the laminate tongues 50a and 50b is sufficient to work in conjunction with the Flow deflector for the air-guiding chamber 49 and the sound-absorbing channels 48 adjoining its through openings 49b and 49c to achieve the high sound-absorbing effect that is worth striving for. Over most of its length, the sound absorption channels 48 formed by the C-shaped profiles 47 can remain completely open towards the flap 44 or to the air passage openings or grille perforations 39 without a reduction in the sound absorption effect. Cleaning and / or replacement work of the C-shaped profiles 47 formed from the flat material strips are thereby considerably facilitated. After removal of the inner extruded profile 34 with the flap 44, they are easily accessible from the inside in the housing 32.

7 and 8 that the cross-sectionally C-shaped profiles 47 made of sound-absorbing material inside the housing 32 are each preceded by a multilayer wall 51 on the outside. The two cover layers 51 a and 51 b of this multilayer wall 51 each consist of relatively thin, sound-resistant material, for example of hard plastic and / or of metal sheet which acts as a weighting element. The intermediate layer 51, on the other hand, is formed from relatively thick sound-absorbing material, for example cellular rubber, foam plastic or also a non-woven fabric.

The width of the multilayer wall 51 is dimensioned such that it can be inserted into the housing 32 of the ventilation device 31 without any problems and its longitudinal edges can be fixed in position between the two extruded profiles 35 and 36, as can be seen from FIG. 7.

If necessary, a fan can also be inserted into the air guide chamber 49 and possibly into its air passage 49a. This can be carried by the plate 50, which is releasably attached to the housing of the air guide chamber 49.

9 shows the overall view of a ventilation device 61 for rooms, which is preferably suitable for installation in fixed frames or sashes of windows and doors, but which can also be used in slot-like wall openings if necessary.

The ventilation device 61 has an elongated, cuboid housing 62 which is composed of a plurality of longitudinally extruded profiles 63, 64, 65 and 66 and two end plates 67a and 67b.

The extruded profile 63 is three. Extruded profile parts 63a, 63b and 63c are formed, which are connected to one another by longitudinal latching and / or clamping couplings 63e and 63f. The extruded profile parts 63a and 63b are preferably made of thin-walled light metal, while the extruded profile part 63c consists of hard plastic. The extruded profile parts 64, 65 and 66 can also advantageously be made from thin-walled light metal, while the end plates 67a and 67b are in turn made from plastic, for example as injection molded parts.

The shape of the extruded profiles 63, 64, 65 and 66 or the extruded profile parts 63a, 63b and 63c can be seen in detail from FIG. 10. The result is that the extruded profile 63 forming the outer wall of the housing 62 is arranged essentially upright and its extruded profile part 63a has a longitudinally extending, outwardly projecting and downwardly open hollow rib 63g which has an upper, inclined profile wall 63h and a perpendicular Has profile wall 63i.

The hollow rib 63g completely overlaps the extruded profile part 63c from above, the lower edge of its profile wall 63i extending as a drip nose over the upper edge of the lower extruded profile part 63b.

The extruded profile 64 forms the inner wall of the housing 62 and is also arranged essentially upright. It has air passage openings 69 which are distributed uniformly over its entire length and which are arranged, for example, in three rows one above the other and form a grille perforation, as can be clearly seen in FIG. 9. The connection between the outer extruded profile 63 and the inner extruded profile 64 is formed by the substantially horizontally arranged two extruded profiles 65 and 66, which have the same profile cross-section but are arranged symmetrically to a horizontal plane.

On the outwardly directed longitudinal edge, the two extruded profiles 65 and 66 each have a longitudinal, bead-shaped thickening 65a or 66a, with which a plastic profile rod 70 or 71 made by extrusion can be brought into a form-fitting holding engagement via a complementary longitudinal groove 70a or 71a. Each of the plastic profile bars 70 and 71 has on its longitudinal side opposite the cut profile groove 70a or 71a an undercut profile bead 70b or 71b, which in turn can be brought into a positive locking connection with a complementary longitudinal groove 63k or 631 on both longitudinal edges of the extruded profile 63 . The plastic profile bars 70 and 71 produce a heat-insulating holding connection between the outer extruded profile 63 and the upper extruded profile 65 and the lower extruded profile 66 of the housing 62 in this way. The inner longitudinal edge of the extrusion professional le 65 and 66 is provided with an approximately Z-shaped bend 65b to 66b, the free leg 65c or 66c of the same interacting with the inner extruded profile 64 as an alignment and holding element. For this purpose, the inner extruded profile 64 has an angled portion 64a and 64b on each of its two longitudinal edges, which surrounds the free leg 65c and 66c on the outside.

On the back of the inner extruded profile 64, a hook profile 64c is integrally formed above the air passage openings or lattice perforations 69, which has an upward, free hook leg 64d which ends at a predetermined distance below the free leg 65c of the upper extruded profile 65.

A flap 72, which is also formed by an extruded profile, namely a hollow profile, is pivotally assigned to the rear of the inner extruded profile 64, its suspension consisting of a hook profile 72a integrally molded along its upper longitudinal edge, which on the inner side has the upwardly directed leg 64d of the hook profile 64c Extruded profile 64 engages from above, so that the flap 72 is pivotally held. In its vertically depending position, the flap 72 closes off the air passage openings or lattice perforations of the inner extruded profile 64, while in its opening position it assumes the inclined position shown in FIG. 10 and thereby releases the air passage openings or lattice perforations 69.

The back of the flap 72 is covered with a strip 73 of soundproofing material, for example foam plastic or foam rubber.

In Fig. 11 it can be seen that air passage openings 68 can be formed in the extruded profiles 63 forming the outer wall of the housing 62 simply by dividing the central extruded profile part 63c into a larger number of longitudinal sections, the ends of which face each other after the connection with the two extruded profile parts 63a and 63b the desired distance from each other. The number and length of the outer air passage openings 68 can therefore be matched to the most varied of needs in the simplest way and, if necessary, even be varied subsequently.

From Fig. 10 it can still be seen that there is the possibility of forming a sound insulation duct 74 within the housing 62 of the ventilation device. This soundproofing duct 74 is delimited on the one hand by the central extruded profile part 63c of the extruded profile 63 and on the other hand by three insulating strips 75, 76 and 77, which can be made of foam plastic or foam rubber, for example. The insulation strips 75, 76 and 77 are arranged so that they are inclined relative to one another and also realistically relative to the extruded profile part 63c in such a way that the soundproofing duct 74 has a trapezoidal cross section, as can be clearly seen from FIG. 10.

Each of the two insulation strips 75 and 76 is releasably or removably clamped on the one hand on the longitudinal edge of the central extruded profile part 63c and on the other hand on longitudinal webs or strips 78 and 79 of the extruded profiles 65 and 66, as can be seen in FIG. 10.

The insulation strip 77 is also held between the longitudinal webs or strips 78 and 79 and is covered on its side facing away from the sound insulation duct 74 with a plate 80 made of weight material, for example sheet metal. To additionally secure the position of the insulation strip 77 and the plate 80 made of weight material with its longitudinal edges in the trough-shaped profiled longitudinal webs or strips 78 and 79, spring clips 81 are used, with their ends behind retaining webs 82 and 83 on the inside of the extruded profiles 65 and 66 are indented.

A free space 85 is maintained within the housing 62 of the ventilation device between the inner extruded profile 64 and the insulation strip 77 or the plate 80, within which the flap 72 is pivotally received.

The insulation strip 77 and also the plate 80 of weight material carried by it are either provided with openings distributed in their longitudinal direction or they are formed by a plurality of sections which are divided in the longitudinal direction and keep air passages free between their ends facing each other. In any case, the air passages which are kept free in the area of the insulating material strip 77 or the plate 80 are arranged offset to the side relative to the air passage openings 68 in the outer extruded profile 63, with a gap.

It should only be mentioned that the inner extruded profile 64 of the housing together with the flap 72 is provided such that it can be removed easily. As a result, the interior of the housing 62 can be made easily accessible so that the insulating material strips 75, 76 and 77 enclosing the sound insulation duct 74 can be removed and cleaned or exchanged if necessary.

Fig. 12 of the drawing shows a ventilation device 101 for rooms in an overall view, which is preferably suitable for installation in fixed frames or sashes of windows and doors, but which, if required, can also be used in slot-like wall openings or placed on a wall.

The ventilation device 101 has a long straight, rectangular housing 102, which is composed of an outer or rear wall 103, an inner or front wall 104, a top wall 105, a bottom wall 106 and two end plates 107a and 107b. 10 shows that the outer wall 103, the front wall 104, the top wall 105 and the bottom wall 106 can each consist of thin-walled extruded profiles, which are preferably made of light metal. The outer wall 103 is provided with air passage openings 108, which can be provided distributed over their entire length at greater intervals.

In the front wall 104, on the other hand, there are air passage openings 109 in the form of a grille perforation which extends uniformly over the entire length and consists of several, for example three, rows of curls one above the other.

The outer wall 103 is locked at its longitudinal edges via plastic profile bars 110 and 111 with the longitudinal edges of the top wall 105 and the bottom wall 106 facing it, the plastic profile bars 110 and 111 forming a cold bridge between the outer wall 103 on the one hand and the top wall 105 and the bottom wall 106 on the other hand. Inside the housing 102, on the back of the inside or. Front wall 104, a closure flap 112 is pivotally suspended at 113, with the aid of which the air passage openings or grille perforations 109 of the front wall 104 can optionally be opened or closed. In Fig. 13 the closure flap 112 is shown in its open pivot position. On its longitudinal edge opposite the pivot bearing 113, the closure flap 112 is provided with a dovetail or C-shaped undercut longitudinal groove 114, in which a push rod 115 can be accommodated in a longitudinally movable manner, which in the exemplary embodiment according to FIG. 13 has a flat, rectangular cross section. However, if necessary, it can also have a T-shaped cross section, in which case the T-web protrudes from the opening gap of the longitudinal groove 114, as is indicated in FIG. 13 by dash-dotted lines.

A ventilation drive and locking gear is assigned to the ventilation device 101 according to FIG. 12, of which only the adjusting lever 116 can be seen in the area of the end plate 107b.

As a comparison of FIGS. 14 and 15 with FIG. 13 makes clear, the end plate 107b has an outline shape which is exactly adapted to the cross section of the housing 102 of the ventilation device 101. The end plate 107b has a cup-like shape, that is to say, web-like walls 118 protrude along its boundary edges, which have at least one course that overlaps the walls 103, 104, 105, 106 of the housing 102. The various wall webs are therefore identified by the reference numerals 118 ³ , 118 ¹ , 118 ⁵ and 118 ⁶ . In the area of the wall webs 118 ⁴ , the end plate 107b is provided with a cutout 119, in the area of which the actuating lever 116 of the swing drive and locking gear projects at least with its actuating cam 120 from the housing 102. The actuating lever 116 has, after its actuating cams, a plate 121 with a bearing eye 122 which can be attached from the side to a bearing pin or a bearing sleeve 123 which protrudes from the inner surface of the end plate 107b in the same direction as the wall sections 118 ³ to 118 ⁶ . By means of the bearing eye 122, the plate 121 of the adjusting lever 116 on the bearing pin or the bearing sleeve 123 can be pivoted in the cutout 119 between two end positions, one of which can be seen in FIG. 14 and the other in FIG. 15.

14, the actuating cam 120 of the actuating lever 116 lies at the upper end of the cutout 119 in the end plate 107b, while in the other pivoted position it is located at the lower end of this cutout 119.

The plate 121 of the actuating lever 116 is designed such that it protrudes approximately segment-like from the cutout 119 in the pivoted position according to FIG. 11 with an arcuate surface 124, while it closes the cutout 119 flush with a flat surface 125 in the pivoted position according to FIG. 15 .

At least in the side surface 126 facing away from the end plate 107b, the plate 121 of the actuating lever 116 has a lifting curve 127 which is designed as a laterally open groove and is at least over a part of its length a varying distance relative to the bearing 122, 123 of the actuating lever 116 . The effective length of the lifting curve 127 is matched to the maximum pivoting angle of the actuating lever 116, the end region thereof having the greatest distance from the bearing 122, 123 extending concentrically to this bearing 122, 123 over a certain arc angle. The subsequent length range of this stroke curve 127, however, approaches the bearing 122, 123 of the actuating lever 116 to a minimal distance on a circular arc, the radius of which corresponds to approximately a quarter of the radius of the concentric section.

A pin 128 or a similar projection is in engagement with the stroke curve 127 designed as a cam groove in the plate 121 of the actuating lever 116, which is fastened to the end of the closure flap 112 adjacent to the actuating lever 116 in such a way that it engages with the bearing 113 one Can shift arc. In the pivot position of the adjusting lever 116 shown in FIG. 14, the pin 128 or similar projection of the closure flap 112 lies in the region of the lower end of the lifting curve 127, that is to say it is at its smallest distance from the bearing 122, 122 of the adjusting lever.

15, however, the pin 128 or similar projection of the closure flap 112 has reached the region of the upper end of the lifting curve 127 which has the greatest distance from the bearing 122, 123 for the adjusting lever.

It is readily apparent that by pivoting the adjusting lever 116 between its two end positions shown in FIGS. 14 and 15, the closure flap 112 can be moved relative to the inner or front wall 104 of the housing 102 of the ventilation device 101 about the pivot bearing 113, whereby it moves from the open pivot position according to FIGS. 10 and 11 into the closed position according to FIG. 14 and vice versa. In the closed position according to FIG. 14, the closure flap 112 is locked at one end by the interaction of the pin 128 or the like with the lifting curve 127.

By designing the cam curve 127 as a cam groove or cam slot, the closure flap 112 is positively controlled in both possible directions of movement by the actuating lever 116 via the pin 128 or the like.

At least in the side surface 126 of the plate 121 facing away from the end plate 107b, both in the radial direction and in the circumferential direction with an offset in relation to the lifting curve 127, a depression 129 is formed, which has a second lifting curve 130 which runs inclined transversely to the pivoting plane of the actuating lever 116 in the side surface 126 of the plate 121 runs out. The end region of the lifting curve 130 which runs out into the side surface 126 lies in the vicinity of the actuating cam 120 for the actuating lever 116, as can be clearly seen in FIGS. 14 and 15.

16 and 18 of the drawing, the end 115 'of the push rod 115 facing the swivel lever 115 of the swivel drive and locking mechanism cooperates with the trough 129, the stroke curve 130 emanating therefrom and the side surface 126, which profiled in the undercut profile Longitudinal groove 114 of the closure flap 112 is guided to be longitudinally movable.

14, the end 115 'of the push rod 115 is received by the trough 129 in the side surface 126 of the plate 121, that is to say it projects relatively far from the end of the closure flap 112 which faces the end plate 107b. If the adjusting lever 116 is moved from the swivel position according to FIG. 14 in the direction of the swivel position according to FIG. 15, then the end 115 ^{1 of} the push rod 115 runs inside the trough 129 onto the lifting curve 130 inclined transversely to the swivel plane and thereby gradually increases to the adjacent end of the closure flap 112 is shifted until it lies against the side face 126 of the plate 121 in the pivoted position according to FIG. 15, as can be seen particularly clearly from FIG. 16.

The end 115 ^{2 of} the push rod 115 assigned to the other end of the closure flap 112 interacts in the region of the end plate 107a of the housing 102 as a locking piece with a locking engagement or abutment 131, the arrangement and design of which can be seen in FIGS. 17 and 18 of the drawing. 18 makes it clear that the bolt engagement or the abutment 131 has a bevel 132 which is arranged at an angle to the plane of the end plate 107a and also to the direction of movement of the push rod 115. The pull-in slope 132 is placed such that when the push rod end 115 ² strikes it, the closure flap 112 guiding the push rod 115 is pressed in the direction of its closed position against the back of the inner or front wall 104 of the housing 102 and the air passage openings or Lattice perforations 109 are sealed in this.

So that the pressure effect of the closure flap 112 can be varied by the end 115 ^{2 of} the push rod 115, the locking engagement or the abutment 131 is provided parallel to the plane of the end plate 107b, preferably continuously, adjustably or adjustably. For this purpose, he sits in an end piece 133 which closes the cut-out 119 in the wall section 118 ^{4 of} the end plate 107b with support with a support plate 134 and thereby includes the bearing journal or bearing neck 123 on the inside of the end plate 107a by means of a loop 135. The bolt engagement or the abutment 131 with the bevel 132 consists of a metal bracket, preferably made of spring steel, which is received with its one leg 131 ¹ and its web 131 ² in a guide 136 of the insert piece 133, while its leg 131 ³ with that of Web 131 ² starting draft slope 132 protrudes sideways out of the guide 136, as can be seen in Fig. 18.

The web 131 ^{2 of} the locking engagement or abutment 131 contains a threaded hole 137, which is penetrated by the shaft of a screw 138, which is only rotatable with its head 139, but axially immovable in a holder 140 on the wall 134 of the insert 133. In front of the holder 140 there is a hole 141 in the wall 134 through which a screwdriver can be brought into engagement with the slot in the screw head 139. By Rotation of the screw can thus shift the latch engagement or the abutment 131 in the guide 138 of the insert 133 so that the bevel 132 is subject to a corresponding change in position in order to adjust the pressure effect of the push rod 115 via its end 115 ² .

The push rod 115 can preferably be made of wear-resistant plastic, its end 115 ^{2 being subject to} a certain elasticity of the leg 131 ³ with the bevel 132 on the locking engagement or abutment 131 and thereby also exerting a resilient pressing action on the closure flap 112.

It is advantageous if, on the one hand, the adjusting lever 116 is designed symmetrically transversely to its swivel plane, that is to say that it has stroke curves 127, troughs 129 and stroke curves 130 on both side surfaces 126 of its plate facing away from one another, as is clear from FIG. 16. On the other hand, the insert piece 133 also has a symmetrical design with respect to a plane which runs parallel to the end plates 107a and 107b. As a result, there is the possibility of assigning both the adjusting lever 116 and the insert piece 133 either to the end plate 107a or to the end plate 107b without any problems. The pivot drive and locking gear for the closure flap 112 can therefore be changed at any time, that is to say subsequently, in its installed position for the housing 102 of the ventilation device 101.

14 and 15 of the drawing show that the plate 121 of the actuating lever 116 can be provided at a point approximately diametrically opposite the actuating cam 120 with a toothed segment 142 with which the pinion of an electric servomotor can be brought into engagement, if it is desired to actuate the swivel drive and locking gear by an electric servomotor which is then housed within the housing 102 of the ventilation device 101. In addition, however, the plate 121 of the actuating lever 116 can also be equipped with a driver 143, for example in the form of a radial slot, with which an electrical switching and / or regulating element can be coupled if the ventilation device is equipped with an electrically driven fan.

By means of the swivel drive and locking gear, the drive motor of the blower can be switched on and off, and its speed can also be regulated thereby, whereby the swivel angle of the adjusting lever 116 can be a measure of the working speed of the blower.

If the push rod 115 has a T-shaped cross section, it can be provided with a T-web 115 ³ protruding from the groove 114 with teeth running in its longitudinal direction. 13, a longitudinal toothed rail 44 is assigned to it on the inner or front wall 104, which can be inserted in the longitudinal direction, for example in an undercut groove 104 ¹ . Due to the contraction of the T-bar 115 ³ and the toothed rail 144, the closure flap 112 can then be locked and pressed on over its entire length in the closed position.

Fig. 19 of the drawing shows a ventilation device 20 for rooms in an overall view, which is preferably suitable for installation in fixed frames or sashes of windows and doors, but which can also be used in slot-like wall openings or placed on the wall if required.

The ventilation device 201 has an elongated, rectangular housing 202 which is composed of an outer or rear wall 203, an inner or front wall 204, a top wall 205, a bottom wall 206 and two end plates 207a and 207b. 20 that the outer wall 203, the front wall 204, the top wall 205 and the bottom wall 206 can each consist of thin-walled extruded profiles, which are preferably made of light metal. The outer wall 203 is provided with air passage openings 208, which can be provided at greater intervals over its entire length.

In the front wall 204, on the other hand, there are air passage openings 209 in the form of a grille perforation which extends uniformly over the entire length and consists of several, for example three, rows of locks lying one above the other.

The outer wall 203 is locked at its longitudinal edges via plastic profile bars 210 and 211 with the longitudinal edges of the top wall 205 and the bottom wall 206 facing it, the plastic profile bars 210 and 211 forming a cold bridge between the outer wall 203 on the one hand and the top wall 205 and the bottom wall 206 on the other hand. Inside the housing 202, specifically at the rear of its inner or. Front wall 204 is a flap 212 pivotally suspended at 213, with the help of which the air passage openings or grille perforations 209 of the front wall 204 can optionally be released or closed. In Fig. 20 the closure flap 212 is shown in its open pivot position.

On its longitudinal edge opposite the pivot bearing 213, the closure flap 212 is provided with a dovetail or C-shaped undercut longitudinal groove 214, in which a push rod 215 is accommodated in a longitudinally movable manner can be men, which has a flat-rectangular cross-section in the embodiment of FIG. 20. However, if necessary, it can also have a T-shaped cross section, in which case the T-web protrudes from the opening slot longitudinal groove 214, as is indicated in FIG. 20 by dash-dotted lines.

19 is assigned a swivel drive and locking gear, of which only the control lever 216 can be seen in the area of the end plate 207b.

As a comparison of FIGS. 21 and 22 with FIG. 20 makes clear, the end plate 207b has an outline shape which is exactly adapted to the cross section of the housing 202 of the ventilation device 201. In this case, the end plate 207b has a cup-like shape, ie, web-like walls 218 protrude along its boundary edges, which have at least one course that overlaps the walls 203, 204, 205, 206 of the housing 202. The different wall webs are therefore identified by the reference numerals 218 ³ , 218 ⁴ , 218 ⁵ and 218 ⁶ . In the area of the wall webs 218 ⁴ , the end plate 207b is provided with a cutout 219, in the area of which the actuating lever 216 of the swivel drive and locking gear projects at least with its actuating cam 220 from the housing 202. The actuating lever 216 has a plate 221 following its actuating cam with a bearing eye 222 which can be attached from the side to a bearing pin or a bearing sleeve 223 which protrudes from the inner surface of the end plate 207b in the same direction as the wall sections 218 ³ to 218 ⁶ . By means of the bearing eye 222, the plate 221 of the actuating lever 216 on the bearing pin or the bearing sleeve 223 can be pivoted in the cutout 219 between two end positions, one of which can be seen in FIG. 21 and the other in FIG. 22.

21, the actuating cam 220 of the actuating lever 216 is located at the upper end of the cutout 219 in the end plate 207b, while in the other pivoted position it is located at the lower end of this cutout 219.

The plate 221 of the actuating lever 216 is designed in such a way that in the pivoted position according to FIG. 21 it projects with an arcuate surface 224 from the cutout 219 approximately segment-like, while in the pivoted position according to FIG. 22 with a flat surface 225 the cutout 219 is flush closes.

At least in the respective side surface 226 facing away from the end plate 207b, the plate 221 of the actuating lever 216 has a lifting curve 227 which is designed as a laterally open groove and has a varying distance relative to the bearing 222, 223 of the actuating lever 216 over at least part of its length . The effective length of the lifting curve 227 is matched to the maximum pivoting angle of the actuating lever 216, wherein it runs in a straight line and at an angle between its two end regions, and approaches the bearing 222, 223 to a minimum distance.

The cam 227 in the plate 221 of the actuating lever 216 is engaged by a pin 228 or a similar projection which is fastened to the end of the closure flap 221 adjacent to the actuating lever 216 such that it moves with the bearing 213 on a circular arc can. In the pivot position of the adjusting lever 216 shown in FIG. 21, the pin 228 or similar projection of the closure flap 212 lies in the region of the lower end of the lifting curve 227, i.e. it is at its smallest distance from the bearing 222, 223 of the adjusting lever 216.

In contrast, in the pivoted position of the control lever 216 according to FIG. 22, the pin 228 or similar projection of the closure flap 212 has reached the region of the upper end of the lifting curve 227, which has the greatest distance from the bearing 222, 223 for the control lever 216.

It is readily apparent that by pivoting the actuating lever 216 between its two end positions shown in FIGS. 21 and 22, the closure flap 212 can be moved relative to the inner or front wall 204 of the housing 202 of the ventilation device 201 about the pivot bearing 213, whereby it arrives from the open pivot position according to FIGS. 20 and 21 into the closed position according to FIG. 22 and vice versa. In the closed position according to FIG. 22, the closure flap 212 is locked at one end by the cooperation of the pin 228 or the like with the lifting curve 227.

Due to the design of the lifting curve 227, the closure flap 212 is positively controlled in both possible directions of movement via the adjusting lever 216 via the pin 228 or the like.

At least in the side surface 226 of the plate 221 facing away from the end plate 207b, both in the radial direction and in the circumferential direction at an angle relative to the lifting curve 227, a recess 229 is formed, which has a second lifting curve 230 which is inclined transversely to the pivoting plane of the actuating lever 216 into the side surface 226 of the plate 221 leaks. The end region of the lifting curve 230 that runs out into the side surface 226 lies in the vicinity of the actuating cam 220 for the actuating lever 216, as can be clearly seen in FIGS. 21 and 22.

With the trough 229, the stroke curve 230 emanating therefrom and the side surface 226 of the plate 221, according to FIGS. 23 and 24 of the drawing, the pivot lever 216 of the pivot drive and Locking gear facing end 215 ^{1 of} the push rod 215 together, which is guided longitudinally in the undercut profiled longitudinal groove 214 of the closure flap 212.

21, the end 215 'of the push rod 215 is received by the trough 229 in the side surface 226 of the plate 221, i.e. it protrudes relatively far from the end of the closure flap 212 facing the end plate 207b. If the adjusting lever 216 is moved from the swivel position according to FIG. 21 in the direction of the swivel position according to FIG. 22, then the end 215 ′ of the push rod 215 runs inside the recess 229 onto the lifting curve 230 inclined transversely to the swivel plane and thereby gradually increases to that the adjacent end of the closure flap 212 is shifted until it lies against the side face 226 of the plate 221 in the pivoted position according to FIG. 22, as can be seen particularly clearly from FIG. 23.

The end 215 ^{2 of} the push rod 215 assigned to the other end of the closure flap cooperates in the region of the end plate 207a of the housing 202 as a locking piece with a locking engagement or abutment 231, the arrangement and design of which can be seen in FIGS. 24 and 25 of the drawing. 25 makes it clear that the bolt engagement or the abutment 231 has a bevel 232 which is arranged at an angle to the plane of the end plate 207a and also to the direction of movement of the pushing days 215. Here, the pull-in slope 232 is placed such that when the push rod end 215 ² strikes the closing flap 212 guiding the push rod 215 in the direction of its closed position towards the rear of the inner or. Front wall 204 of the housing 202 is pressed and consequently closes the air passage openings or grille perforations 209 in it in a sealing manner.

So that the pressure effect of the closure flap 212 can be varied by the end 215 ^{2 of} the push rod 215, the locking engagement or the abutment 231 is provided parallel to the plane of the end plate 207b, preferably continuously adjustable or adjustable. For this purpose, it sits in an insert 233 which closes the cutout 219 in the wall section 218 ^{4 of} the end plate 207a with support by means of a support plate 234 and thereby includes the bearing pin or bearing neck 223 on the inside of the end plate 207a by means of a loop 235. The bolt engagement or the abutment 231 with the bevel 232 consists of a metal bracket, preferably made of spring steel, which is received with its one leg 231 ¹ and its web 231 ² in a guide 236 of the insert 233, while its leg 231 ³ with the Web 231 ² starting tightening slope 232 protrudes sideways out of the guide 236, as can be seen in FIG. 25.

The web 231 ^{2 of} the bolt engagement or abutment 231 contains a threaded hole 237, which is penetrated by the shaft of a screw 238, which is only rotatable with its head 239, but axially immovable in a holder 240 on the wall 234 of the insert 233. In front of the holder 240 there is a hole 241 in the wall 234 through which a screwdriver can be brought into engagement with the slot in the screw head 239. By turning the screw, the bolt engagement or the abutment 231 can be shifted in the guide 238 of the insert 233, so that the bevel 232 is also subject to a corresponding change in position in order to adjust the pressure effect of the push rod 215 via its end 215 ² .

The push rod 215 can preferably be made of wear-resistant plastic, its end 215 ^{2 being subject to} a certain elasticity of the leg 231 ³ with the bevel 232 on the locking engagement or abutment 231 and thereby also having a resilient impression effect on the closure flap 212.

It is advantageous if, on the one hand, the adjusting lever 216 is designed symmetrically transversely to its swivel plane, that is to say that it has lifting curves 227, troughs 229 and lifting curves 230 on both side surfaces 226 of its plate 221, as shown in FIG. 23. On the other hand, the insert 233 also has a symmetrical design with respect to a plane that runs parallel to the end plates 207a and 207b. As a result, it is easily possible to assign both the setting lever 216 and the insert 233 to either the end plate 207a or the end plate 207b. The swivel drive and locking gear for the closure flap can therefore be changed at any time, that is to say subsequently, in its installed position for the housing 202 of the ventilation device 201.

21 and 22 of the drawing show that the plate 221 of the actuating lever 216 can be provided at a point diametrically opposite the actuating cam 220 with a toothed segment 242 with which the pinion of an electric servomotor can be brought into engagement if it is is desired to actuate the swivel drive and locking gear by an electric servomotor, which is then housed within the housing 202 of the ventilation device 201. In addition, the plate 221 of the actuating lever 216 can also be equipped with a driver 243, for example in the form of a radial slot, with which an electrically safe switching and / or regulating element 244 can be coupled if the ventilation device 201 is equipped with an electrically driven fan 245. The switching and / or regulating element 33 is indicated in FIGS. 21, 22 and 23 of the drawing by dash-dotted lines.

Due to the swivel drive and locking gear, the drive motor of the blower 245 can not only be switched on and off; rather, its speed can also be regulated thereby, the pivoting angle of the adjusting lever 216 being a measure of the working speed of the blower 245.

If the push rod 215 has a T-shaped cross section, its T-web 215 ³ protruding from the groove 214 can be provided with teeth running in its longitudinal direction. According to FIG. 20, it is then attached to the inside or. Front wall 204 is assigned a longitudinal toothed rail 244 which can be inserted in the longitudinal direction, for example in an undercut groove 204 ¹ thereof. By interlocking the T-bar 215 ³ and the toothed rail 244, the closure flap 212 can then be locked and pressed over its entire length in the closed position.

The switching and / or regulating element 244 forms an essential component of a speed controller for the electric drive motor of the blower 245, the entire circuitry of which is shown in FIG. 26.

The switching and / or regulating element 244 has, as can be seen from FIGS. 21 and 22 as well as 25 and 26, two coaxial coils 247 and 248, one behind the other and inductively coupled to one another exclusively by a common, axially displaceable core 246, of which the Coil 247 forms a primary coil and coil 248 forms a secondary coil.

Via a bent connecting arm 249, which can be seen in particular in FIG. 25, the core 246 is in constant coupling engagement with the driver 243 of the actuating lever 216. By pivoting the actuating lever 216, the core 246 can therefore be axially displaced relative to the two coaxial coils 247 and 248 between the two end positions shown in FIGS. 21 and 22, with each pivoting angle of the actuating lever 216 having a very specific axial sliding position of the core 246 relative to coils 247 and 248.

In any case, the arrangement is such that the axially displaceable core 246 continuously passes through the secondary coil 248 over its entire length, while it is infinitely variable in relation to the primary coil 247 in its operative position between a maximum dimension according to FIG. 21 and a minimum dimension according to FIG. 22 can be relocated.

22, the primary coil 247 cannot induce any voltage in the secondary coil 248, in the axial sliding position of the core 246 according to FIG. 21 the highest possible voltage is induced by the primary coil 247 in the secondary coil 248.

Both coils 247 and 248 have a matching design. It has proven useful to use both for the primary coil 247 and for the secondary coil 248, which have a maximum diameter of 8.5 mm and a resistance of 1200 ohms with a length of 18 mm.

The inner diameter of the coils 247 and 248 is preferably approximately 3.5 mm, while the outer diameter of the core 246 immersed in them is preferably approximately 15% smaller, that is to say approximately 3 mm. It has proven useful to use a material for the core 246 which is usually used as a welding wire alloy.

The primary coil 247 of the switching and / or regulating element 244 can be connected via a capacitor 250 and possibly a resistor 251 connected in parallel to it as a spark extinguisher by means of a switching contact 252 to the AC network of, for example, 220 volt voltage, as is readily shown in the figure. 26 can be removed. A design is selected for the switching elements located in the primary circuit, by means of which a maximum working voltage of 8.5 volts is established in the primary coil 247. For example, the capacitor 250 has a capacitance of 0.1 _I LF for this purpose.

The secondary coil 248 of the switching and / or control element 244 forms with a diode 253, a capacitor 254 at least one, but preferably a plurality of resistors 255a, 255b and 255c and a transistor 256 and a bridge rectifier 257 the actual speed control circuit for the electric motor of the fan 245.

The operating voltage of the speed control circuit used to control the permeability of the bridge rectifier 257 is in the present case between 0.0 and 4.0 volts.

It has proven particularly useful if a so-called MOS FET transistor is used as transistor 256, because the built-in free-wheeling diode enables the speed controller to function optimally while avoiding voltage peaks.

The working range of the transistor 256 is adjusted by the three resistors 255a, 255b and 255c, the resistor 255a being at the G terminal, the resistor 255b at the S terminal and the resistor 255c at the D terminal of the transistor 256.

Via the relay 258 still shown in FIG. 26 With the two changeover contacts 258a and 258b, the direction of rotation of the fan 245 can be influenced, if necessary, for the purpose of ventilation or venting operation of the ventilation device 201.

The switching and / or regulating element 244 of the speed controller, which is equipped with the two coils 247 and 248 and the common core 246, works practically completely without wear and, as a result, has a high long-term operational reliability with a low cost of ownership.

Claims (30)

1. A room ventilator having an elongate parallelepipedic casing (2) combined from a number of longitudinal extruded sections (3 - 6) and two closure plates (7a, 7b), each section (3 - 6) being made at choice from light metal or plastics, an outer substantially vertical section (3) being formed with an air aperture or air apertures (8) disposed at choice at one or more places along its length while an also upright inner section (4) opposite the penulti- mately mentioned section (3) is formed with air apertures (9) distributed uniformly over its whole length and adapted to be closed or opened by another and adjustable extruded section (14) associated with the last-mentioned apertures (9) and disposed in the casing (2), the outer section (3) and inner section (4) being secured to one another by top and bottom substantially horizontal extruded sections (5, 6), the extruded section which is adjustable in the casing (2) being in the form of a flap (14) suspended for pivoting around one of its longitudinal edges, characterised in that a hook section member (14a) devised along the longitudinal edge around which the edge flap (14) is pivotable is effective as the suspension of the flap (14) and engages over (14b, 4i) a hook section member (4h) on the inner extruded section (4), the latter hook section member (4h) being oppositely directed to the first-mentioned hook section member (14a), and an arm (5c) engages supportingly and securingly over the hooked section member (14a) of the flap (14) (Figs. 2, 3 and 5) and is disposed on the top extruded section (5) supporting or retaining the inner extruded section (4).

2. A ventilator according to claim 1, characterised in that by way of C-shaped or U-shaped catch claws (4c) on both its longitudinal edges (4a, 4b) the inner extruded section (4) can catch releasably and/or be clamped in companion C-shaped or U-shaped matching catch claws (5c, 5d, 5e and 6c, 6d, 6e respectively) of the two extruded sections (5, 6) supporting the inner extruded section (4) (Fig. 5).

3. A ventilator according to claim 1 and/or 2, characterised in that the extruded section effective as the flap (14) is a hollow section member having at least on its inner long side retainers (14d) for a sound-insulating strip or block (15).

4. A ventilator according to any of claims 1 to 3, characterised in that the flap (14) has on its longitudinal edge remote from the hook section member (14a) an undercut dovetail or C-shaped guide section (14e) into which a locking bar (16) or the like can be introduced for longitudinal movement, there being associated with the bar (16) in the closure plate (7a and 7b) at both ends of the casing (2) abutments effective as locking elements or engagements when the flap (14) is in the closed position.

5. A ventilator according to any of claims 1 to 4, characterised in that the outer extruded section (3) has a longitudinally extending outwardly projecting and substantially trapezoidal-section hollow rib (3a) whose downwardly extending wall (3c) is formed with the air apertures (8), a water drip (3e) preferably extending downwardly over the last-mentioned wall (3d) (Figs. 2 and 3).

6. A ventilator according to any of claims 1 to 5, characterised in that a sound-absorbing substantially G-section or C-section member (17) is introduced into the casing (2) and is formed, in its wall (17a) adjacent the hollow rib (3a) of the outer extruded section (3), with at least one aperture (17b) which extends into the hollow rib (3a) while its slot-like elongate aperture (17) in the opposite wall (17d) is substantially at the height of the suspension (14a, 4h) of the flap (14) on the inner extruded section (4) (Fig. 2).

7. A ventilator according to any of claims 1 to 6, characterised in that the outer extruded section (3) is positively connected by way of its longitudinal edges and with the interposition of coupling section members (10, II) to the top horizontal extruded section (5) and bottom horizontal extruded section (6) (3f, 3g, 10b, 11b, 10a, 11 a, 5g, 6g; Figs. 2 and 3).

8. A ventilator according to claim 7, characterised in that all the extruded sections (3 - 6) are made of thin-walled light metal while the coupling sections (10, 11) are made of a heat- insulating plastics.

9. A ventilator according to claim 7 and/or 8, characterised in that coupling elements (10a, 10b and 11 a, 11 b respectively; 3f, 3g; 5a and 6a) consisting of companion undercut profiled tongues and grooves, for example, of the kind having an arcuately bounded cross-section, are provided on the coupling section members (10, 11) and the extruded sections (3, 5, 6) associated therewith (Figs. 2 and 3).

10. A ventilator according to any of claims 1 to 9, characterised in that the top extruded section (5) and the bottom extruded section (6) each have two longitudinal ribs or the like (5f, 5g and 6f, 6g respectively) which project towards their inside and are spaced apart from the main plane of the outer extruded section (3) and inner extruded section (4) and between which an air-guiding chamber (19) embodied by two mouldings (18b, 19c) symmetrical of a horizontal longitudinal centre-plane (19a, 19a) can be introduced into the casing (2), the air-guiding chamber (19) bounding a tubular air passage (19d) towards the outer extruded section (3) and being formed from the air passage (19d) with passages (19e, 19f) directed to opposite sides (Figs. 3 and 4).

11. A ventilator according to claim 10, characterised in that the air-guiding chamber longitudinal wall which is opposite the air passage (19d) is effective as a releasable connecting member (20) for the two mouldings (19b, 19c) and as a support for a blower (24), more particularly an axial-flow fan, introducible into the air-guiding chamber (19) (Figs. 3 and 4).

12. A ventilator according to any of claims 1 to 5 and 7 to 11, characterised in that a sound-absorbent substantially C-section member (47) is introduced into the casing (2), is associated laterally with an air-guiding chamber (49) therein and is devised from a flat strip of material which is introduced longitudinally of itself into the casing (32) transversely thereof with two bends (47a, 47b) and retained in the casing (32) by its natural tension (Fig. 7); and merely those ends of each C-section (47) which are adjacent the air-guiding chamber (49) are covered on their opening side by relatively short laminated strips (50a, 50b respectively) (Fig. 8).

13. A ventilator according to claim 12, characterised in that the length of the laminated strips (50a, 50b) corresponds substantially to the internal cross-sectional height of the member (47) between its parallel arms (47d, 47e).

14. A ventilator according to claim 12 and/or 13, characterised in that disposed before the C-section member (47) on the outside is a laminated wall (51) whose covering layers (51 a, 51 b) are each made of a relatively thin rever- berant material, such as hard plastics and/or sheet metal, the intermediate layer (51 c) being made of a relatively thick sound-absorbent material such as sponge rubber or foam plastics or fibre fleece.

15. A ventilator according to any of claims 1 to 5 and 7 to 8, characterised in that the outer wall (63) of the casing (62) is embodied by three extruded sections (63a, 63b, 63c) interconnectable or interconnected by detent and/or clamping couplings (63e, 63f), the central extruded section part (63c) being interrupted one or more times to leave the air apertures (68) (Fig. 11).

16. A ventilator according to claim 15, characterised in that the top extruded section (63a) and the bottom extruded section (63b) are each made of light metal and the central extruded section (63c) is made of plastics.

17. A ventilator according to claim 15 and/or 16, characterised in that a trapezoidal-section sound-damping channel (74) is devised in the casing (62) and is bounded by the central extruded section (63c) and by three damping strips (75, 76, 77) for example, of foam plastics or sponge rubber, disposed at an inclination relatively to one another (Fig. 10).

18. A ventilator according to any of claims 15 to 17, characterised in that the damping strip (77) of the sound-damping channel (74), such strip extending parallel to the central extruded section (63), is covered on the outside by a panel (80) of a heavy material such as sheet metal.

19. A ventilator according to any of claims 15 to 18, characterised in that the damping strip (77) is interrupted or subdivided lengthwise, the perforations or interruption zones being offset laterally and at an inclination relatively to the air apertures (68) kept open by the central extruded section part (63c).

20. A ventilator according to any of claims 17 to 19, characterised In that the damping strips (75 - 77) are releasably retained by clamping action between longitudinal webs and/or ridges or the like (78, 79) on the inside of the casing (62), the damping strip (77) which has the heavy panel (80) preferably being additionally secured in position (82, 83; Fig. 10) by intercalated spring stirrups (81).

21. A ventilator according to any of claims 1, 3, 4 and 6, characterised in that a pivoting driving and locking transmission is in operative engagement (128) with the flap (112), the same being mounted for pivoting (113) around one of its longitudinal edges behind the closure plate (104), for example; of the parallelepipedic casing (102), such plate being disposed on the room side and being formed with the air apertures (109), more particularly with a grid of apertures, by way of an actuating lever (116) mounted for pivoting around an axis parallel to the pivoting axis of the flap, the actuating lever (116) being mounted for pivoting (122) around a pivot (123) offset both heightwise and depthwise relatively to the pivot bearing (113) of the flap (112) and having a cam (127) which is curved in the pivoting plane, has a varying distance relatively to the pivot (123) over at least some of Its length and engages a projection (128) at the end of the flap (112).

22. A ventilator according to claim 21, characterised in that the actuating lever (116) has another cam (129, 130, 126) which is directed transversely of the pivoting plane of the latter lever and with which a push rod effective as locking bar is in operative engagement (128), the push rod (115) being guided for longitudinal movement on the flap (112) at a distance from and parallel to the pivot bearing (113) thereof and having at least one locking member (115²) adapted to be moved into and out of retentive engagement with a bolt catch or abutment (131, 132) on the casing side.

23. A ventilator according to claim 21 and/or 22, characterised in that the first cam (127) is in the form of a curved slot or a curved groove in the side surface (126) of the actuating lever (116, 121), the projection (128) of the flap (112) extending laterally into such slot or groove, while the second cam (129, 130, 126) is disposed in a trough (129) in the same lateral surface (126) of the actuating lever (116, 121), the trough (129) and the second cam (129, 130, 126) preferably being angularly offset both radially and peripherally from the first cam (127) in the side surface (126) of the actuating lever (116, 121) (Figs. 14 and 15).

24. A ventilator according to any of claims 21 to 23, characterised in that the actuating lever (116) is devised symmetrically of a plane cutting its pivot (122, 123) at right angles - i.e., it has two cams (127, 129 and 130, 136) in each of the two side surfaces (126) (Fig. 16) - and is, with advantage, mounted (122, 123) on the inside of an end plate (107a, 107b) of a casing (102) and contacts, by way of the second cam (129, 130, 126) disposed in its lateral surface (126) remote from the end plate (107a, 107b), one end (115¹) of the push rod (115) guided (114) in the flap (112) while a tightening surface (132) effective as locking engagement and abutment (131) is associated at least with the other end (115²) of the push rod (115) on the opposite end plate (107b, 107a) of the casing (102) (Figs. 17 and 18), the inclined tightening surface (132) with the locking engagement or abutment (131) conveniently being adjustable (137, 138, 139), preferably steplessly, parallel to the plane of the end plate (107b, 107a) (Figs. 17 and 18), the adjusting element (137, 138, 138) for the locking engagement or abutment (131) taking, if desired, the form of- a screwthreaded spindle mounted (140) rotatably but axially non-movably in the end plate (107b, 107a) and having at its exposed end (139) tool-engaging means such as a cross-slot.

25. A ventilator according to claim 22 and/or 24, characterised in that the push rod (115) is made of a wear-resistant plastics section received in an undercut longitudinal groove (114) in the flap (112), such groove serving as guide member and, conveniently, the locking engagement or abutment (131) is disposed in an insert (133) secured releasably but positively (134, 135, 123) in a cut-out (119) in the end plate (107b, 107a), the insert (133) advantageously being formed substantially symmetrically of a centre-plane parallel to the end plate (107b, 107a) and being suitable for right and left fitting at choice, while mutatis mutandis the cut-out (119) for receiving the actuating lever (116, 121) in the end plates (107a, 107b) corresponds to the cut-out (119) for receiving the insert (133) and, if desired, the actuating lever (116, 121) carries, at a place substantially diametrically opposite the actuating cam (120) which projects from the end plate (107a, 107b), a toothed segment (142) engageable by a drive gear of an adjusting motor, while in the zone between the toothed segment (142) and the actuating cam (120) there is an entraining member (143) engageable by an electrical switching and/or locking member for the driving motor of a blower.

26. A room ventilator according to any of claims 1 to 25 having an electric-motor-driven blower controllable by way of a speed controller, characterised in that the speed controller has two windings (247, 238) inductively coupled with one another solely by a common axially movable core (246), the primary winding (247) being connectable to the mains supply by way of a capacitor (250) and possibly of a resistance (251) shunted across the capacitor to limit sparking, by a switch contact (252), while the secondary winding (248) co-operates with a diode (253), capacitor (254), at least one resistance (255a, 255b, 255c), a transistor and a bridge rectifier (257) to embody the speed control circuit for the blower motor (Fig. 26).

27. A ventilator according to claim 26, characterised in that the axially movable core (246) extends permanently through the secondary winding (248) over the whole length thereof while in its operative position it is movable relatively to the primary winding (247) between a maximum (Fig. 21) and a minimum (Fig. 22).

28. A ventilator according to claim 26 and/or 27, characterised in that the diameter of the core (246) is about 15% less than the internal diameter of the windings (247, 248).

29. A ventilator according to any of claims 26 to 28, characterised in that the windings (247, 248) have, for example, if they are 18 mm long, an outer diameter of 8.5 mm, an inner diameter of 3.5 mm and a resistance of 1200 ohms.

30. A ventilator according to any of claims 26 to 29, characterised in that the core (46) of the two windings (47, 48) consists of a welding wire alloy and, for example, the transistor (56) is a MOS FET transistor.

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