Classifications

• • E—FIXED CONSTRUCTIONS
  • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
  • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
  • E06B7/00—Special arrangements or measures in connection with doors or windows
  • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
  • E06B7/10—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses by special construction of the frame members

Definitions

• the invention relates to a device for limiting the air flow of a forced ventilation window.
• DE 199 29 133 C2 relates to a plastic window made of sash and frame with a window rebate between an outer frame seal and an inner sash seal, air flowing between the sash and the frame from the outside to the inside and vice versa through the window fold.
• At least one rebate fan is provided for the window rebate, which has an air guide chamber and a volume flow limiter.
• a ventilation flap which is mounted in an oscillating manner in two side mountings and is mounted within the fitting groove of the lower horizontal casement.
• the above-mentioned air flow limiting device for a forced-ventilated window generate an unpleasant knocking or rattling noise each time the ventilation flap is closed, which considerably reduces the comfort of such a device.
• DE 196 10 428 C2 relates to a force-ventilated window with a frame, casement and a center seal.
• the seal has a first sealing lip, the upper end of which rests against a stop face of the frame or casement frame when the window is closed. Air passage openings are located in this first sealing lip.
• the seal also has a second sealing lip, which is elastic, freely movable when the window is closed and arranged at an acute angle to the first sealing lip so that when an ifo-determined differential pressure between the outside of the window and the inside of the window is exceeded, the air passage ö openings are at least partially closed.
• This solution does not produce any stop or rattling noise when closing, but the seal must be manufactured with very high precision in order to achieve a reproducible closing characteristic of the seal.
• this construction is not suitable for closing the air passage openings even at relatively low air pressure differences.
• the object of the present invention is therefore to provide a device for limiting the air flow of a forced-ventilation window, which can be produced with little effort, precisely even with small pressure differences the ventilation throttles and at least largely suppresses a stop or rattling noise.
• the invention solves this problem by an air flow limiting device for a forced-ventilated window, with a closing device for the automatic opening and closing of a ventilation path depending on the pressure difference, characterized by a spring or soft-elastic damping element which is subjected to bending when the air flow limiting device is closed and dampens the closing movement of the closure device.
• An air flow limiting device for a forced-ventilated window is preferably used, with a ventilation flap which is mounted so as to oscillate about an axis of rotation and which can assume a first basic position that releases a ventilation path and a second position that closes the ventilation path, with a stop edge of the ventilation flap spaced from the axis of rotation on one Stop surface comes to a sealing contact, the air flow limiting device having a spring or soft elastic, spaced apart from the stop surface damping element which is subjected to bending when closing the ventilation flap and thereby dampens the closing movement of the ventilation flap.
• a force-ventilated window for the use of an air flow limiting device preferably has a frame known from the art, composed of window frame profiles, and a corresponding window frame formed from window frame profiles.
• Frame profiles and casement profiles are preferably made of plastic, in particular hard PVC. However, other materials can be used without departing from the scope of the present invention.
• Frame profiles usually have a receiving groove for receiving a glazing bead in the rebate area on the room side.
• the mounting groove serves as fixed glazing - ie without a sash - for mounting the glazing bead that holds the fixed glazing.
• this mounting groove is normally only used for mounting locking parts. According to a preferred development of the invention, the invention uses this receiving groove for fastening the air flow limiting device.
• the force-ventilated window typically has a rebate chamber formed between the frame and casement, through which air can flow from the outside of the window to the inside of the room.
• the device according to the invention for limiting the air flow is provided in the upper horizontal fold area, this air flow limiting device preferably having a base body and a ventilation flap which is mounted in an oscillating manner in the base body.
• the base body has locking means with which it can be fastened in the receiving groove. Possibly. can also be attached by one or more screws.
• the axis of rotation about which this ventilation flap can oscillate runs within the receiving groove for receiving a glass strip.
• the device for air flow limitation is arranged in the rebate area of the closed window in such a way that the air flowing from the outside of the window to the room side is directed past the ventilation flap.
• a defined flow velocity is exceeded, which is accompanied by a defined pressure difference between the outside of the window and the interior of the room, the ventilation flap, which is preferably held exclusively by gravity, is pivoted out of the rest position and initially strikes the spring or soft-elastic damping element according to the invention, before the ventilation flap is completely closed.
• the spring or soft elastic damping element When the ventilation flap is closed further, the spring or soft elastic damping element is subjected to bending and dampens the further closing movement of the closure device before it strikes a stop surface, as a result of which the further air supply is throttled or preferably at least largely interrupted. As long as the air pressure difference between the outside of the window and the inside of the room exceeds a defined amount, the ventilation flap remains in this "closed position". After falling below a certain differential pressure, the ventilation flap swivels back into the vertical rest position due to its own weight and thus releases the ventilation path again.
• the ventilation flap preferably has a straight, symmetrical cross-sectional shape without counterweights, etc. on .
• the base body has a stop surface against which the pendulum-mounted ventilation flap lies sealingly in the closed position.
• the rebate-side surface of the wing stop chamber serves as a stop surface for the ventilation flap.
• the body of the air flow limiting device according to the invention is preferably sealed against the casement by a seal.
• this seal can be connected in one piece to the base body.
• the production is then preferably carried out in the two-component injection molding process known to the person skilled in the art.
• the spring-elastic or soft-elastic damping element used according to the invention consists of a particularly cylindrical, pin-shaped, soft-elastic material which only absorbs very small forces when subjected to bending.
• the cross-sectional area is preferably 0.5 to 2.5 mm 2 , preferably 0.7 to 1.5 mm 2, the length 2 to 15 mm, preferably 3 to 8 mm, and the Shore hardness 25 to 70, in particular 30 to 60
• the damping element is preferably arranged such that the gap between the ventilation flap and the stop surface at the moment the ventilation flap first comes into contact with the damping element is approximately 0.3 to 1.2 mm, preferably 0.4 to 0.8 mm.
• the invention uses a special effect which can be observed when the ventilation flap is closed: when a certain pressure difference between the outside of the room and the inside of the room is exceeded, the flap begins - driven by the air flowing past - with its automatic closing movement. If the ventilation flap exceeds a certain closing angle, it is in an unstable state, which leads to an accelerated further closing of the ventilation flap. After the ventilation flap has been closed, the pressure difference must first decrease again somewhat until the ventilation flap is then suddenly opened completely (hysteresis).
• the spring-elastic or soft-elastic damping element used according to the invention is set sufficiently soft, this hysteresis effect does not cause the ventilation flap even in the case of air pressure differences which are in the range of the critical air pressure difference when the ventilation flap is closed insists on an intermediate position, but is either largely opened or completely closed.
• the spring characteristic of the spring or soft-elastic damping element can also be selected such that the ventilation flap only closes gradually after the first contact with the damping element as the pressure difference increases. The flow cross-section then becomes smaller with increasing pressure difference, so that the air volume flow passing through can be kept approximately constant over a larger pressure difference until the ventilation flap closes completely when a certain pressure difference is exceeded.
• FIG. 1 shows a cross section through a window with an air flow limiting device according to the invention (open air passage);
• Fig. 2 is a window as in Figure 1 in the closed position of the air flow limiting device;
• 3 shows a perspective view of the air flow limiting device;
• FIG. 4 shows a cross section through the base body of the air flow limiting device; 5 Detail "A" according to FIG. 3, seen from the outside of the window;
• FIG. 6 shows a cross section through the air flow limiting device shortly before closing; 7 shows a cross section through the air flow limiting device in the closed position; 8 shows the test protocol of a forced ventilation window with an air flow limiting device according to the invention
• the forced ventilation Fe shown in Fig. 1 consists essentially of the frame 1, which is composed of bend frame profiles 2 made of hard PVC, the diecjelrahmen 3, the is composed of the sash profiles 4, and the air flow limiting device 10.
• the air flow limiting device 10 is shown in section in FIGS. 6 and 7. It consists essentially of the base body 11, which was injection molded from ABS, and the ventilation flap 12, which also consists of ABS.
• the base body 11, shown in Fig. 3 in a perspective view, has on its upper side the latching means 13 so that it can be clipped into the glass retaining strip on the groove 5 of the upper horizontal frame profile 2.
• the ventilation flap 12 has a round bearing pin 21 on both ends, which serves as a suspension with the axis of rotation 15 in the base body 11.
• the ventilation flap 12 is thus freely movable between a vertical basic position (FIG. 1) and a "closed position" (FIGS. 2 and 7).
• the air can, as indicated in Fig. 1 by corresponding arrows, from the folding chamber 7 through the between the ventilation flap 12 and the stop surface 16 of the base body 11 and a gap between the frame 1 and the stop chamber 6 of the casement flow into the interior 9 of the room. So that the fresh air can get into the rebate chamber 7 from the outside of the window 8, recesses in the outer stop seal 17 have been made in the area of the vertical sides of the window in a manner known per se to the person skilled in the art (not shown in the figures).
• the stop knob 18, shown enlarged in FIG. 5, consists of an elastomer with a Shore A hardness of 40 and has a diameter of 1.2 mm and a free length of 4 mm. It is thus set so softly that it is subjected to bending when the ventilation flap 12 strikes (FIGS. 6, 7) until the flap 12 finally comes into sealing contact with the stop surface 16.
• the force with which the stop knob 18 acts on the ventilation flap 12 is so low that the flap initially remains in the closed position (FIG. 7) due to the air pressure difference between the outside 8 of the window and the side of the room 9 until the air pressure has dropped somewhat again. Nevertheless, the stop knob 18 dampens the closing movement of the ventilation flap 12 to such an extent that rattling noises are reliably suppressed.
• the base body 11 In order to seal the base body 11 with respect to the casement 3 and to prevent air from flowing in between the base body 11 and the stop chamber 6, the base body 11 has a seal 14 on three sides.
• this seal 14 is integrally connected to the base body (two-shot injection molding process). In the view from the room side 9, this seal 14 is U-shaped. In the area in which the base body 11 or the seal 14 touches the casement 3, the otherwise circumferential inner stop seal of the casement 3 is released.
• the seal 14 is made from the same material as the stop knob 18, namely from a thermoplastic elastomer with a Shore hardness of 40.
• the base body 11 of the air flow limiting device 10 has two on its side facing the room Spacers 19, which in turn have small knobs 20 made of flexible material on the room side.
• the stop chamber 6 of the casement 3 comes into contact with these knobs when the window is closed, the spacers 19 on the one hand ensuring a defined joint width between the frame 1 and the casement 3 and on the other hand the base body 11 the necessary Has rigidity to form a straight stop surface 16 for the ventilation flap 12.
• the axis of rotation 15 of the air flow limiting device 10 is arranged such that, in the installed state (FIG. 1, FIG. 2), it is still inside the glass holding strip receiving groove 5, that is to say above the lower edge of the glass holding strip Recording groove 5, lies.
• the ventilation flap 12 When pivoting the ventilation flap 12 into the closed position (FIG. 2), the ventilation flap 12 just touches the lower edge of the receiving groove 5 on the room side, so that air flows in from the receiving groove 5 through the gap between this lower edge of the receiving groove 5 on the room side and the Ventilation flap 12 is largely avoided.
• FIGS. 1 and 2 The window shown in FIGS. 1 and 2 with the dimensions 1.15 m by 1.40 m was equipped with two of the air flow limiting devices 10 in the upper horizontal spar and with respect to the air volume flow (“air loss”) as a function of the differential pressure between the outside of the window 8 and room side 9 measured.
• air loss air volume flow
• FIG. 8 At about 20 Pa pressure difference, marked “A” in Fig. 8, the ventilation flap 12 closes until the first contact with the stop knob 18.
• the geometry of the stop knob 18 together with its Shore hardness causes the pressure difference to gradually close the Ventilation flap 12 so that the volume flow remains almost constant at approx. 1 m 3 / h per m joint length over relatively wide ranges up to approximately 200 Pa.
• point "B” in Fig. 1 the ventilation flap 12 is then completely closed.

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Publications (1)

Family

ID=34895402

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Citations (6)

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• 2004
  • 2004-03-12 DE DE200410012644 patent/DE102004012644A1/de not_active Withdrawn
• 2005
  • 2005-03-08 EP EP05716951A patent/EP1727957B1/de active Active
  • 2005-03-08 RU RU2006135930/03A patent/RU2374415C2/ru not_active IP Right Cessation
  • 2005-03-08 WO PCT/EP2005/051023 patent/WO2005088058A1/de active Application Filing

Patent Citations (7)

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